Update version to 13.6.3 in metadata.yaml

Author: Umm-E-Kulsum

modules/compute_instance/metadata.yaml

@@ -25,7 +25,7 @@ spec:
       repo: https://github.com/terraform-google-modules/terraform-google-vm
       sourceType: git
       dir: /modules/compute_instance
-    version: 13.6.2
+    version: 13.6.3
     actuationTool:
       flavor: Terraform
       version: ">=1.3.0"