ci: use RELEASE_TOKEN to enable workflow triggers

Replace GITHUB_TOKEN with RELEASE_TOKEN (PAT) in release-plz workflow
to allow release-plz to trigger cargo-dist workflow when creating tags.

Author: joshrotenberg

.github/workflows/release-plz.yml

@@ -18,13 +18,13 @@ jobs:
         uses: actions/checkout@v4
         with:
           fetch-depth: 0
-          token: ${{ secrets.GITHUB_TOKEN }}
+          token: ${{ secrets.RELEASE_TOKEN }}
 
       - name: Install Rust toolchain
         uses: dtolnay/rust-toolchain@stable
 
       - name: Run release-plz
         uses: MarcoIeni/release-plz-action@v0.5
         env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GITHUB_TOKEN: ${{ secrets.RELEASE_TOKEN }}
           CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN }}