Update ci.yml

Author: HaoK

.azure/pipelines/ci.yml

@@ -661,6 +661,17 @@ stages:
         beforeBuild:
         - powershell: "& ./src/Servers/IIS/tools/UpdateIISExpressCertificate.ps1; & ./src/Servers/IIS/tools/update_schema.ps1"
           displayName: Setup IISExpress test certificates and schema
+        - task: Cache@2
+          inputs:
+            key: 'pw | "$(Agent.OS)" | eng/versions.props'
+            restoreKeys: |
+               pw | "$(Agent.OS)"
+            path: $(PLAYWRIGHT_BROWSERS_PATH)
+            cacheHitVar: CACHE_PLAYWRIGHT_HIT
+          displayName: Cache playwright browsers
+        - script: npm i -D playwright
+          condition: ne(variables['CACHE_PLAYWRIGHT_HIT'], 'true')
+          
         artifacts:
         - name: Windows_Test_Dumps
           path: artifacts/dumps/
@@ -738,7 +749,7 @@ stages:
             cacheHitVar: CACHE_PLAYWRIGHT_HIT
           displayName: Cache playwright browsers
         - script: npm i -D playwright
-          condition: ne(variables.CACHE_PLAYWRIGHT_HIT, 'true')
+          condition: ne(variables['CACHE_PLAYWRIGHT_HIT'], 'true')
 
         # Build the shared framework
         - script: ./eng/build.cmd -ci -nobl -all -pack -arch x64