Update CodeQL config

- set top-level permissions on the workflow
- add `step-security/harden-runner` to provide network egress filtering
  and runtime security
- pin actions by SHA

.github/workflows/codeql-analysis.yml

@@ -1,5 +1,8 @@
 name: "CodeQL"
 
+permissions:
+  contents: read
+
 on:
   push:
     branches: ["main"]
@@ -34,12 +37,17 @@ jobs:
         # Learn more about CodeQL language support at https://aka.ms/codeql-docs/language-support
 
     steps:
+    - name: Harden Runner
+      uses: step-security/harden-runner@0080882f6c36860b6ba35c610c98ce87d4e2f26f # v2.10.2
+      with:
+        egress-policy: audit
+
     - name: Checkout repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
-      uses: github/codeql-action/init@v3
+      uses: github/codeql-action/init@ea9e4e37992a54ee68a9622e985e60c8e8f12d9f # v3.27.4
       with:
         languages: ${{ matrix.language }}
         # If you wish to specify custom queries, you can do so here or in a config file.
@@ -52,7 +60,7 @@ 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@v3
+      uses: github/codeql-action/autobuild@1b1aada464948af03b950897e5eb522f92603cc2 # v3.24.9
 
     # 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
@@ -65,6 +73,6 @@ jobs:
     #   ./location_of_script_within_repo/buildscript.sh
 
     - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v3
+      uses: github/codeql-action/analyze@ea9e4e37992a54ee68a9622e985e60c8e8f12d9f # v3.27.4
       with:
         category: "/language:${{matrix.language}}"