fix(ci): only check if access token is set

Author: jeertmans

.github/workflows/publish.yml

@@ -8,9 +8,6 @@ on:
 
 name: Publish
 
-permissions:
-  contents: read
-
 jobs:
   publish:
     name: Publish
@@ -28,6 +25,8 @@ jobs:
   check-publish:
     name: Check Publish
     runs-on: ubuntu-latest
+    env:
+      CARGO_REGISTRY_TOKEN: ${{ secrets.CRATES_TOKEN }}
     if: startsWith(github.ref, 'refs/tags/v') != true
     steps:
     - name: Checkout sources
@@ -37,4 +36,5 @@ jobs:
       uses: dtolnay/rust-toolchain@stable
 
     - name: Check if can publish on crates.io
-      run: cargo publish --token ${{ secrets.CRATES_TOKEN }} --dry-run -v
+      if: ${{ env.CARGO_REGISTRY_TOKEN }}
+      run: cargo publish --token ${{ env.CARGO_REGISTRY_TOKEN }} --dry-run -v