Update actions/checkout digest to 93cb6ef (#259)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/build-and-test.yml

@@ -11,7 +11,7 @@ jobs:
     env:
       MOZ_HEADLESS: 1
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
+      - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5
       - uses: actions/setup-node@v6
         with:
           node-version: '24.11'
@@ -34,7 +34,7 @@ jobs:
     needs: build
     if: github.ref == 'refs/heads/main'
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
+      - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5
         with:
           # Use our own token instead of the default token
           # this step persists login credentials so strongly that we couldn't get them to override