[Snyk] Security upgrade middleman-gh-pages from 0.0.3 to 0.0.3

[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:
  • docs/all_files/Gemfile.lock

Vulnerabilities that will be fixed

With an upgrade:

Severity	Issue	Breaking Change	Exploit Maturity
	Arbitrary Code Injection SNYK-RUBY-RAKE-552000	No	Proof of Concept

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

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