Migrate to supported Action to generate GitHub App tokens

The previous GitHub Action we were using to generate tokens has been
deprecated.

See:
- https://github.com/tibdex/github-app-token
- https://github.com/actions/create-github-app-token

Author: elasticdog

.github/workflows/bump-version-flutter-app.yml

@@ -30,10 +30,10 @@ jobs:
     steps:
       - id: generate_token
         name: Generate a GitHub App token
-        uses: tibdex/github-app-token@3beb63f4bd073e61482598c45c71c1019b59b73a
+        uses: actions/create-github-app-token@bcd2ba49218906704ab6c1aa796996da409d3eb1
         with:
-          app_id: ${{ secrets.APP_ID }}
-          private_key: ${{ secrets.APP_PRIVATE_KEY }}
+          client-id: ${{ secrets.APP_ID }}
+          private-key: ${{ secrets.APP_PRIVATE_KEY }}
 
       - name: Checkout source code
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd

.github/workflows/bump-version-flutter-lib.yml

@@ -34,10 +34,10 @@ jobs:
 
       - id: generate_token
         name: Generate a GitHub App token
-        uses: tibdex/github-app-token@3beb63f4bd073e61482598c45c71c1019b59b73a
+        uses: actions/create-github-app-token@bcd2ba49218906704ab6c1aa796996da409d3eb1
         with:
-          app_id: ${{ secrets.APP_ID }}
-          private_key: ${{ secrets.APP_PRIVATE_KEY }}
+          client-id: ${{ secrets.APP_ID }}
+          private-key: ${{ secrets.APP_PRIVATE_KEY }}
 
       - name: Checkout source code
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd

.github/workflows/bump-version-rust.yml

@@ -45,10 +45,10 @@ jobs:
 
       - id: generate_token
         name: Generate a GitHub App token
-        uses: tibdex/github-app-token@3beb63f4bd073e61482598c45c71c1019b59b73a
+        uses: actions/create-github-app-token@bcd2ba49218906704ab6c1aa796996da409d3eb1
         with:
-          app_id: ${{ secrets.APP_ID }}
-          private_key: ${{ secrets.APP_PRIVATE_KEY }}
+          client-id: ${{ secrets.APP_ID }}
+          private-key: ${{ secrets.APP_PRIVATE_KEY }}
 
       - name: Checkout source code
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd

.github/workflows/tag-if-missing.yml

@@ -22,10 +22,10 @@ jobs:
     steps:
       - id: generate_token
         name: Generate a GitHub App token
-        uses: tibdex/github-app-token@3beb63f4bd073e61482598c45c71c1019b59b73a
+        uses: actions/create-github-app-token@bcd2ba49218906704ab6c1aa796996da409d3eb1
         with:
-          app_id: ${{ secrets.APP_ID }}
-          private_key: ${{ secrets.APP_PRIVATE_KEY }}
+          client-id: ${{ secrets.APP_ID }}
+          private-key: ${{ secrets.APP_PRIVATE_KEY }}
 
       - name: Checkout source code
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd

.github/workflows/tag-untagged-releases-rust.yml

@@ -23,10 +23,10 @@ jobs:
     steps:
       - id: generate_token
         name: Generate a GitHub App token
-        uses: tibdex/github-app-token@3beb63f4bd073e61482598c45c71c1019b59b73a
+        uses: actions/create-github-app-token@bcd2ba49218906704ab6c1aa796996da409d3eb1
         with:
-          app_id: ${{ secrets.APP_ID }}
-          private_key: ${{ secrets.APP_PRIVATE_KEY }}
+          client-id: ${{ secrets.APP_ID }}
+          private-key: ${{ secrets.APP_PRIVATE_KEY }}
 
       - name: Checkout source code
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd