Merge #2089: ci: Swap tibdex for actions/create-github-app-token in cron-update-rust.yml

ef4ae3c ci: Swap `tibdex` for `actions/create-github-app-token` in `cron-update-rust.yml` (valued mammal)

Pull request description:

  ### Description

  Move away from the now archived `tibdex/github-app-token` in `cron-update-rust.yml` workflow in favor of official [`actions/create-github-app-token`](https://github.com/marketplace/actions/create-github-app-token).

  fix #2072

  ### Checklists

  #### All Submissions:

  * [x] I followed the [contribution guidelines](https://github.com/bitcoindevkit/bdk/blob/master/CONTRIBUTING.md)

ACKs for top commit:
  oleonardolima:
    ACK ef4ae3c
  luisschwab:
    ACK ef4ae3c

Tree-SHA512: 70ceac0707055a33f1a27be55d0e8ba4d7f63db11270ed70be5966a8c1675a1d6ec3b14344d17406fb439d830be327b14f74270f084c49efa5e2096c5a392502

Author: ValuedMammal

.github/workflows/cron-update-rust.yml

@@ -15,11 +15,11 @@ jobs:
         with:
           persist-credentials: false
       - uses: dtolnay/rust-toolchain@stable
-      - uses: tibdex/github-app-token@v2
+      - uses: actions/create-github-app-token@v2
         id: generate-token
         with:
-          app_id: ${{ secrets.APP_ID }}
-          private_key: ${{ secrets.APP_PRIVATE_KEY }}
+          app-id: ${{ secrets.APP_ID }}
+          private-key: ${{ secrets.APP_PRIVATE_KEY }}
       - uses: crazy-max/ghaction-import-gpg@v6
         with:
           gpg_private_key: ${{ secrets.GPG_PRIVATE_KEY }}