fix: fallback to GITHUB_TOKEN when JELLYROCK_BOT_TOKEN is unavailable

This fixes workflow failures on Dependabot PRs where repository secrets
are not available for security reasons.

Author: cewert

.github/workflows/build.yml

@@ -10,7 +10,7 @@ jobs:
     steps:
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
         with:
-          token: ${{ secrets.JELLYROCK_BOT_TOKEN }}
+          token: ${{ secrets.JELLYROCK_BOT_TOKEN || secrets.GITHUB_TOKEN }}
       - uses: actions/setup-node@2028fbc5c25fe9cf00d9f06a71cc4710d4507903 # v6
         with:
           node-version: "lts/*"

.github/workflows/update.yml

@@ -11,7 +11,7 @@ jobs:
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
         with:
           ref: ${{ github.ref_name }}
-          token: ${{ secrets.JELLYROCK_BOT_TOKEN }}
+          token: ${{ secrets.JELLYROCK_BOT_TOKEN || secrets.GITHUB_TOKEN }}
       - uses: actions/setup-node@2028fbc5c25fe9cf00d9f06a71cc4710d4507903 # v6
         with:
           node-version: "lts/*"