[Snyk] Fix for 1 vulnerabilities

[tcdowney]

This PR was automatically created by Snyk using the credentials of a real user.

 ### Snyk has created this PR to fix 1 vulnerabilities in the rubygems dependencies of this project. #### Snyk changed the following file(s): - `spec/Gemfile` - `spec/Gemfile.lock` #### Vulnerabilities that will be fixed with an upgrade: | | Issue | Score | :-------------------------:|:-------------------------|:-------------------------  | Denial of Service (DoS)
[SNYK-RUBY-REXML-7462086](https://snyk.io/vuln/SNYK-RUBY-REXML-7462086) |   **551**   --- > [!IMPORTANT] > > - Check the changes in this PR to ensure they won't cause issues with your project. > - Max score is 1000. Note that the real score may have changed since the PR was raised. > - This PR was automatically created by Snyk using the credentials of a real user. --- **Note:** _You are seeing this because you or someone else with access to this repository has authorized Snyk to open fix PRs._ For more information: 🧐 [View latest project report](https://app.snyk.io/org/tdowney/project/c017dcdb-4b1c-4b9c-8415-95b27e63ed69?utm_source=github&utm_medium=referral&page=fix-pr) 📜 [Customise PR templates](https://docs.snyk.io/scan-using-snyk/pull-requests/snyk-fix-pull-or-merge-requests/customize-pr-templates) 🛠 [Adjust project settings](https://app.snyk.io/org/tdowney/project/c017dcdb-4b1c-4b9c-8415-95b27e63ed69?utm_source=github&utm_medium=referral&page=fix-pr/settings) 📚 [Read about Snyk's upgrade logic](https://support.snyk.io/hc/en-us/articles/360003891078-Snyk-patches-to-fix-vulnerabilities) --- **Learn how to fix vulnerabilities with free interactive lessons:** 🦉 [Denial of Service (DoS)](https://learn.snyk.io/lesson/redos/?loc=fix-pr) [//]: # 'snyk:metadata:{"customTemplate":{"variablesUsed":[],"fieldsUsed":[]},"dependencies":[{"name":"rubocop","from":"1.64.1","to":"1.65.0"},{"name":"rubocop-rspec","from":"2.31.0","to":"3.0.0"}],"env":"prod","issuesToFix":[{"exploit_maturity":"No Known Exploit","id":"SNYK-RUBY-REXML-7462086","priority_score":551,"priority_score_factors":[{"type":"freshness","label":true,"score":71},{"type":"fixability","label":true,"score":214},{"type":"cvssScore","label":"5.3","score":265},{"type":"scoreVersion","label":"v1","score":1}],"severity":"medium","title":"Denial of Service (DoS)"},{"exploit_maturity":"No Known Exploit","id":"SNYK-RUBY-REXML-7462086","priority_score":551,"priority_score_factors":[{"type":"freshness","label":true,"score":71},{"type":"fixability","label":true,"score":214},{"type":"cvssScore","label":"5.3","score":265},{"type":"scoreVersion","label":"v1","score":1}],"severity":"medium","title":"Denial of Service (DoS)"},{"exploit_maturity":"No Known Exploit","id":"SNYK-RUBY-REXML-7462086","priority_score":551,"priority_score_factors":[{"type":"freshness","label":true,"score":71},{"type":"fixability","label":true,"score":214},{"type":"cvssScore","label":"5.3","score":265},{"type":"scoreVersion","label":"v1","score":1}],"severity":"medium","title":"Denial of Service (DoS)"},{"exploit_maturity":"No Known Exploit","id":"SNYK-RUBY-REXML-7462086","priority_score":551,"priority_score_factors":[{"type":"freshness","label":true,"score":71},{"type":"fixability","label":true,"score":214},{"type":"cvssScore","label":"5.3","score":265},{"type":"scoreVersion","label":"v1","score":1}],"severity":"medium","title":"Denial of Service (DoS)"},{"exploit_maturity":"No Known Exploit","id":"SNYK-RUBY-REXML-7462086","priority_score":551,"priority_score_factors":[{"type":"freshness","label":true,"score":71},{"type":"fixability","label":true,"score":214},{"type":"cvssScore","label":"5.3","score":265},{"type":"scoreVersion","label":"v1","score":1}],"severity":"medium","title":"Denial of Service (DoS)"}],"prId":"36279890-e268-4d93-a074-a445f2b6589f","prPublicId":"36279890-e268-4d93-a074-a445f2b6589f","packageManager":"rubygems","priorityScoreList":[551],"projectPublicId":"c017dcdb-4b1c-4b9c-8415-95b27e63ed69","projectUrl":"https://app.snyk.io/org/tdowney/project/c017dcdb-4b1c-4b9c-8415-95b27e63ed69?utm_source=github&utm_medium=referral&page=fix-pr","prType":"fix","templateFieldSources":{"branchName":"default","commitMessage":"default","description":"default","title":"default"},"templateVariants":["priorityScore"],"type":"auto","upgrade":["SNYK-RUBY-REXML-7462086"],"vulns":["SNYK-RUBY-REXML-7462086"],"patch":[],"isBreakingChange":true,"remediationStrategy":"vuln"}'

[philippthun]

Upgrade of rexml to version 3.3.2 is done in PR #445.