Merging 657c2f3 into releases/v2

Conductor for this PR is @edoardopirovano

Contains the following pull requests:

• python-setup: Check if pip is already installed for Python2 #1039 - python-setup: Check if pip is already installed for Python2 (@RasmusWL)
• Run ML-powered queries on Windows with CodeQL CLI 2.9.0+ #1051 - Run ML-powered queries on Windows with CodeQL CLI 2.9.0+ (@henrymercer)
• Update contributing.md #1063 - Update contributing.md (@aeisenberg)
• Mergeback v2.1.10 refs/heads/releases/v2 into main #1064 - Mergeback v2.1.10 refs/heads/releases/v2 into main (@alexet)
• Mergeback v2.1.10 refs/heads/releases/v2 into main #1067 - Mergeback v2.1.10 refs/heads/releases/v2 into main (@henrymercer)
• Mergeback v2.1.10 refs/heads/releases/v2 into main #1070 - Mergeback v2.1.10 refs/heads/releases/v2 into main (@henrymercer)
• Update default CodeQL to 2.9.2 #1074 - Update default CodeQL to 2.9.2 (@edoardopirovano)
• Bump @actions/tool-cache to 2.0.0 #1075 - Bump @actions/tool-cache to 2.0.0 (@henrymercer)
• Fix a typo in the CHANGELOG #1076 - Fix a typo in the CHANGELOG (@henrymercer)

Please review the following:

• The CHANGELOG displays the correct version and date.
• The CHANGELOG includes all relevant, user-facing changes since the last release.
• There are no unexpected commits being merged into the releases/v2 branch.
• The docs team is aware of any documentation changes that need to be released.
• The mergeback PR is merged back into main after this PR is merged.
• The v1 release PR is merged after this PR is merged.