Hub installation steps added

Author: muzahidul-opti

.github/workflows/swift.yml

@@ -57,6 +57,20 @@ jobs:
     - uses: maxim-lobanov/setup-xcode@v1
       with:
         xcode-version: 14.1.0
+    - uses: actions/checkout@v2
+      with:
+        # You should create a personal access token and store it in your repository
+        token: ${{ secrets.CI_USER_TOKEN }}
+        repository: 'optimizely/travisci-tools'
+        path: 'home/runner/travisci-tools'
+        ref: 'master'
+    - name: Install hub
+      shell: bash
+      env:
+        HOME: 'home/runner'
+      run: |
+        # installs hub to ~/bin
+        $HOME/travisci-tools/release_github/install_hub.sh
     - id: prepare_for_release
       name: Prepare for release
       env: