Change recommended VS Code extensions (#7199)

Author: joechung-msft

.vscode/extensions.json

@@ -1,10 +1,4 @@
 {
-	"recommendations": [
-		"github.vscode-pull-request-github",
-		"eg2.tslint",
-		"esbenp.prettier-vscode"
-	],
-	"unwantedRecommendations": [
-		
-	]
-}
+  "recommendations": ["github.vscode-pull-request-github", "esbenp.prettier-vscode", "dbaeumer.vscode-eslint"],
+  "unwantedRecommendations": []
+}