chore: pin GitHub Actions and Docker base images to full-length hashes (OSSF scorecard) (#2658)

* Initial plan

* chore: pin GitHub Actions dependencies to specific commit SHAs (OSSF)

Agent-Logs-Url: https://github.com/mikefarah/yq/sessions/cbd03f0a-f2dc-4da4-b01c-7dd06ad83ee9

Co-authored-by: mikefarah <1151925+mikefarah@users.noreply.github.com>

* chore: pin Dockerfile base images to specific SHA digests (OSSF)

Agent-Logs-Url: https://github.com/mikefarah/yq/sessions/7a8f6690-37fb-42ab-b3dc-0dd23c270fbe

Co-authored-by: mikefarah <1151925+mikefarah@users.noreply.github.com>

* chore: revert yq pins in test-yq.yml; add release note for github-action/Dockerfile SHA

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Co-authored-by: mikefarah <1151925+mikefarah@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: mikefarah <1151925+mikefarah@users.noreply.github.com>

.github/workflows/codeql.yml

@@ -38,11 +38,11 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v6
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
-      uses: github/codeql-action/init@v4
+      uses: github/codeql-action/init@c10b8064de6f491fea524254123dbe5e09572f13 # v4.35.1
       with:
         languages: ${{ matrix.language }}
         # If you wish to specify custom queries, you can do so here or in a config file.
@@ -53,7 +53,7 @@ jobs:
     # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
     # If this step fails, then you should remove it and run the build manually (see below)
     - name: Autobuild
-      uses: github/codeql-action/autobuild@v4
+      uses: github/codeql-action/autobuild@c10b8064de6f491fea524254123dbe5e09572f13 # v4.35.1
 
     # ℹ️ Command-line programs to run using the OS shell.
     # 📚 See https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#jobsjob_idstepsrun
@@ -67,4 +67,4 @@ jobs:
     #   make release
 
     - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v4
+      uses: github/codeql-action/analyze@c10b8064de6f491fea524254123dbe5e09572f13 # v4.35.1