fix: explicitly set GITHUB_TOKEN env var so secret-envs can resolve it

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: lukashankeln

.github/workflows/build-multiarch.yml

@@ -102,6 +102,8 @@ jobs:
     permissions:
       contents: read
       packages: write
+    env:
+      GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     outputs:
       digest: ${{ steps.build.outputs.digest }}
     steps:
@@ -150,6 +152,8 @@ jobs:
     permissions:
       contents: read
       packages: write
+    env:
+      GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     outputs:
       digest: ${{ steps.build.outputs.digest }}
     steps:
@@ -198,6 +202,8 @@ jobs:
     permissions:
       contents: read
       packages: write
+    env:
+      GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     outputs:
       digest: ${{ steps.build.outputs.digest }}
     steps: