[Snyk] Security upgrade github-pages from 218 to 219

[panickervinod]

Snyk has created this PR to fix 1 vulnerabilities in the rubygems dependencies of this project.

Snyk changed the following file(s):

• docs/Gemfile
• docs/Gemfile.lock

Vulnerabilities that will be fixed with an upgrade:

	Issue	Score
	Server-side Request Forgery (SSRF) SNYK-RUBY-FARADAY-15253521	631

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🦉 Server-side Request Forgery (SSRF)