remove `_` from run service name (#171)
remove `_` from run service name (#171)

This PR will replace the name of a cloud run service to remove unallowed `_` character:

Context:
```
│ Error: Error creating Service: googleapi: Error 400: metadata.name: Resource name must use only lowercase letters, numbers and '-'. Must begin with a letter and cannot end with a '-'. Maximum length is 63 characters.
│ Details:
│ [
│   {
│     "@type": "type.googleapis.com/google.rpc.BadRequest",
│     "fieldViolations": [
│       {
│         "description": "Resource name must use only lowercase letters, numbers and '-'. Must begin with a letter and cannot end with a '-'. Maximum length is 63 characters.",
│         "field": "metadata.name"
│       }
│     ]
│   }
│ ]
```
terraform-google-modules/terraform-docs-samples,terraform-google-modules/terraform-docs-samples