upgrade appcontainers (#432)

Author: motm32

package-lock.json

@@ -504,7 +504,7 @@
         "webpack-cli": "^4.6.0"
     },
     "dependencies": {
-        "@azure/arm-appcontainers": "^2.0.0-beta.1",
+        "@azure/arm-appcontainers": "^2.0.0-beta.3",
         "@azure/arm-containerregistry": "^10.0.0",
         "@azure/arm-operationalinsights": "^8.0.0",
         "@azure/arm-resources": "^5.0.1",