Merge pull request #432 from github/use-deterministic-installs

fix: update dependency installation command to be deterministic

Author: GrantBirki

.github/workflows/copilot-setup-steps.yml

@@ -23,4 +23,4 @@ jobs:
           cache: 'npm'
 
       - name: install dependencies
-        run: npm install
+        run: npm ci