ci: use crates.io trusted publishing (#354)

Author: robjtede

.github/workflows/release.yml

@@ -3,6 +3,7 @@ name: Release-plz
 permissions:
   pull-requests: write
   contents: write
+  id-token: write
 
 on:
   push:
@@ -22,8 +23,12 @@ jobs:
       - name: Install Rust toolchain
         uses: dtolnay/rust-toolchain@stable
 
+      - name: Authenticate with crates.io
+        uses: rust-lang/crates-io-auth-action@v1
+        id: auth
+
       - name: Run release-plz
         uses: MarcoIeni/[email protected]
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN }}
+          CARGO_REGISTRY_TOKEN: ${{ steps.auth.outputs.token }}