chore(samples): fix region tag import (#142)

Author: FrodoTheTrue

compute/compute/snippets/sample_start_stop.py

@@ -17,8 +17,18 @@
 """
 A sample script showing how to start and stop Google Compute Engine instances.
 """
+
+# [START compute_start_instance]
+# [START compute_start_enc_instance]
+# [START compute_stop_instance]
+# [START compute_reset_instance]
 from google.cloud import compute_v1
 
+# [END compute_reset_instance]
+# [END compute_stop_instance]
+# [END compute_start_enc_instance]
+# [END compute_start_instance]
+
 
 # [START compute_start_instance]
 def start_instance(project_id: str, zone: str, instance_name: str):