fix: make publish dry-run script match dogfood publish script (#169)

.gcp/publish-dry-run.yaml

@@ -1,14 +1,11 @@
 steps:
   # Install dependencies
-  - name: 'ubuntu'
-    entrypoint: 'bash'
-    args: ['-c', 'apt-get', 'install', '-y', 'rsync']
-  - name: 'node'
+  - name: 'node:bookworm'
     entrypoint: 'npm'
     args: ['install']
 
   # Run prerelease versioning script across workspaces with dynamic version
-  - name: 'node'
+  - name: 'node:bookworm'
     entrypoint: 'npm'
     args:
       [
@@ -20,12 +17,12 @@ steps:
       ]
 
   # Run prerelease dependency script across workspaces
-  - name: 'node'
+  - name: 'node:bookworm'
     entrypoint: 'npm'
     args: ['run', 'prerelease:deps', '--workspaces']
 
   # Authenticate with our registry
-  - name: 'node'
+  - name: 'node:bookworm'
     entrypoint: 'npm'
     args: ['run', 'auth']