ci: use release bot for releasing (#145)

Author: gadomski

.github/workflows/release-plz.yml

@@ -22,12 +22,18 @@ jobs:
       - &install-rust
         name: Install Rust toolchain
         uses: dtolnay/rust-toolchain@stable
+      - &get-app-token
+        uses: actions/create-github-app-token@v2.0.6
+        id: app-token
+        with:
+          app-id: ${{ secrets.DS_RELEASE_BOT_ID }}
+          private-key: ${{ secrets.DS_RELEASE_BOT_PRIVATE_KEY }}
       - name: Run release-plz
         uses: release-plz/action@v0.5
         with:
           command: release
         env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GITHUB_TOKEN: ${{ steps.app-token.outputs.token }}
   release-plz-pr:
     name: Release-plz PR
     runs-on: ubuntu-latest
@@ -42,9 +48,10 @@ jobs:
     steps:
       - *checkout
       - *install-rust
+      - *get-app-token
       - name: Run release-plz
         uses: release-plz/action@v0.5
         with:
           command: release-pr
         env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GITHUB_TOKEN: ${{ steps.app-token.outputs.token }}