docs: sync fixes from production branch

[ciarams87]

Merge pull request #1949 from nginxinc/DOCOPS-238

fix: fix broken link DOCOPS-238
fix: reword 'here' link to provide more context

Merge pull request #1954 from nginxinc/DOCOPS-238b

Docops 238b - reword link
fix: link examples to git DOCOPS-228

fix: point to the release branch

fix: revert change to non-example link

fix: revert tree to blob as required

fix: tree and blob urls

Merge pull request #1959 from nginxinc/DOCS-228

fix: DOCOPS-228 fix links to examples

Proposed changes

Describe the use case and detail of the change. If this PR addresses an issue on GitHub, make sure to include a link to that issue here in this description (not in the title of the PR).

Checklist

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• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have checked that all unit tests pass after adding my changes
• I have updated necessary documentation
• I have rebased my branch onto master
• I will ensure my PR is targeting the master branch and pulling from my branch from my own fork