fix: update GitHub App token secret reference in workflow files

Author: BarkinKctp

.github/workflows/citus-package-all-platforms-test.yml

@@ -39,7 +39,7 @@ jobs:
         uses: actions/create-github-app-token@v2
         with:
           app-id: ${{ vars.GH_APP_ID }}
-          private-key: ${{ secrets.GITHUB_APP_PRIVATE_KEY }}
+          private-key: ${{ secrets.GH_APP_KEY }}
           owner: citusdata
           repositories: |
             tools

.github/workflows/package-tests.yml

@@ -24,7 +24,7 @@ jobs:
         uses: actions/create-github-app-token@v2
         with:
           app-id: ${{ vars.GH_APP_ID }}
-          private-key: ${{ secrets.GITHUB_APP_PRIVATE_KEY }}
+          private-key: ${{ secrets.GH_APP_KEY }}
           owner: citusdata
       - name: Checkout
         uses: actions/checkout@v3

.github/workflows/packaging-methods-tests.yml

@@ -17,7 +17,7 @@ jobs:
         uses: actions/create-github-app-token@v2
         with:
           app-id: ${{ vars.GH_APP_ID }}
-          private-key: ${{ secrets.GITHUB_APP_PRIVATE_KEY }}
+          private-key: ${{ secrets.GH_APP_KEY }}
           owner: citusdata
           repositories: |
             tools

.github/workflows/publish-docker-image-tests.yml

@@ -18,7 +18,7 @@ jobs:
         uses: actions/create-github-app-token@v2
         with:
           app-id: ${{ vars.GH_APP_ID }}
-          private-key: ${{ secrets.GITHUB_APP_PRIVATE_KEY }}
+          private-key: ${{ secrets.GH_APP_KEY }}
           owner: citusdata
 
       - name: Checkout repository