[Snyk] Fix for 8 vulnerabilities

[snyk-bot]

Snyk has created this PR to fix one or more vulnerable packages in the `rubygems` dependencies of this project.

Changes included in this PR

• Changes to the following files to upgrade the vulnerable dependencies to a fixed version:
  • Gemfile

⚠️ Warning

``` Failed to update the Gemfile.lock, please update manually before merging. ```

Vulnerabilities that will be fixed

With an upgrade:

Severity	Priority Score (*)	Issue	Breaking Change	Exploit Maturity
	661/1000 Why? Recently disclosed, Has a fix available, CVSS 7.5	Regular Expression Denial of Service (ReDoS) SNYK-RUBY-LOOFAH-3168317	No	No Known Exploit
	591/1000 Why? Recently disclosed, Has a fix available, CVSS 6.1	Cross-site Scripting (XSS) SNYK-RUBY-LOOFAH-3168318	No	No Known Exploit
	661/1000 Why? Recently disclosed, Has a fix available, CVSS 7.5	Uncontrolled Recursion SNYK-RUBY-LOOFAH-3168649	No	No Known Exploit
	616/1000 Why? Proof of Concept exploit, Has a fix available, CVSS 5.9	Web Cache Poisoning SNYK-RUBY-RACK-1061917	No	Proof of Concept
	556/1000 Why? Recently disclosed, Has a fix available, CVSS 5.4	Cross-site Scripting (XSS) SNYK-RUBY-RAILSHTMLSANITIZER-3168316	No	No Known Exploit
	661/1000 Why? Recently disclosed, Has a fix available, CVSS 7.5	Regular Expression Denial of Service (ReDoS) SNYK-RUBY-RAILSHTMLSANITIZER-3168646	No	No Known Exploit
	698/1000 Why? Proof of Concept exploit, Recently disclosed, Has a fix available, CVSS 6.1	Cross-site Scripting (XSS) SNYK-RUBY-RAILSHTMLSANITIZER-3168647	No	Proof of Concept
	496/1000 Why? Recently disclosed, Has a fix available, CVSS 4.2	Cross-site Scripting (XSS) SNYK-RUBY-RAILSHTMLSANITIZER-3168648	No	No Known Exploit

(*) Note that the real score may have changed since the PR was raised.

Check the changes in this PR to ensure they won't cause issues with your project.

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