fix error message for job name validator

src/spring/azext_spring/jobs/job_validators.py

@@ -99,7 +99,7 @@ def _validate_job_name(job_name):
     matchObj = match(r'^[a-z][a-z0-9-]{2,30}[a-z0-9]$', job_name)
     if matchObj is None:
         raise InvalidArgumentValueError(
-            '--name should start with lowercase and only contain numbers and lowercases with length [4,31]')
+            'The job name is invalid. It can contain only lowercase letters, numbers and hyphens. The first character must be a letter. The last character must be a letter or number. The value must be between 4 and 32 characters long.')
 
 
 def _validate_envs(namespace):