Add SSH agent setup for cross-repo dependencies

Required for git+ssh:// dependency URLs to work in GitHub Actions

Author: bchampp

.github/workflows/deploy-examples.yml

@@ -30,6 +30,11 @@ jobs:
     steps:
     - uses: actions/checkout@v4
 
+    - name: Setup SSH Agent
+      uses: webfactory/ssh-agent@v0.9.0
+      with:
+        ssh-private-key: ${{ secrets.SSH_PRIVATE_KEY }}
+    
     - name: Setup Python
       uses: actions/setup-python@v4
       with:
@@ -89,6 +94,11 @@ jobs:
     steps:
     - uses: actions/checkout@v4
 
+    - name: Setup SSH Agent
+      uses: webfactory/ssh-agent@v0.9.0
+      with:
+        ssh-private-key: ${{ secrets.SSH_PRIVATE_KEY }}
+    
     - name: Setup Python
       uses: actions/setup-python@v4
       with: