build: validate locked dependencies with npm ci

Author: wenytang-ms

.azure-pipelines/ci.yml

@@ -55,7 +55,7 @@ extends:
                 inputs:
                   versionSpec: 20.x
               - template: /.azure-pipelines/npm-cfs.yml@self
-              - script: npm install
+              - script: npm ci
                 displayName: Validate npm dependencies from CFS
           - job: Job_1
             displayName: Agent job 1