Update GitHub Actions workflows to use specific action versions

Author: andrew

.github/workflows/main.yml

@@ -26,11 +26,11 @@ jobs:
           - '4.0'
 
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
+      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
         with:
           persist-credentials: false
       - name: Set up Ruby
-        uses: ruby/setup-ruby@4c24fa5ec04b2e79eb40571b1cee2a0d2b705771
+        uses: ruby/setup-ruby@4c24fa5ec04b2e79eb40571b1cee2a0d2b705771 # v1
         with:
           ruby-version: ${{ matrix.ruby }}
           bundler-cache: true

.github/workflows/zizmor.yml

@@ -22,9 +22,9 @@ jobs:
       actions: read # query workflow runs
     steps:
       - name: Checkout repository
-        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
+        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
         with:
           persist-credentials: false
 
       - name: Run zizmor
-        uses: zizmorcore/zizmor-action@6ef14ad7cd47dc49f8df59d6f8f6c1929af29568
+        uses: zizmorcore/zizmor-action@e639db99335bc9038abc0e066dfcd72e23d26fb4 # v0.3.0