[Snyk] Security upgrade github-pages from 227 to 227

[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
	558/1000 Why? Proof of Concept exploit, Recently disclosed, Has a fix available, CVSS 3.3	Out-of-bounds Read SNYK-RUBY-COMMONMARKER-3318398	No	Proof of Concept
	461/1000 Why? Recently disclosed, Has a fix available, CVSS 3.5	Denial of Service (DoS) SNYK-RUBY-COMMONMARKER-3318399	No	No Known Exploit
	668/1000 Why? Proof of Concept exploit, Recently disclosed, Has a fix available, CVSS 5.5	Denial of Service (DoS) SNYK-RUBY-COMMONMARKER-3318400	No	Proof of Concept
	461/1000 Why? Recently disclosed, Has a fix available, CVSS 3.5	Denial of Service (DoS) SNYK-RUBY-COMMONMARKER-3318401	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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