docs: Fix conflict tag introduced in PR 104 (#106)

* add securitycenter prefix to samples, wrap published samples and replace unpublished entirely.

* Fix unmatched region tags

* Fix more unmatched region tags

* fix lint issue with function antipattern

* docs: standardize new tags with most-used tag from other languages

* fix conflicting tag by making more explicit to the contained function

samples/snippets/snippets_security_marks.py

@@ -118,7 +118,7 @@ def delete_and_update_marks(asset_name):
 
 def add_to_finding(finding_name):
     """Adds security marks to a finding. """
-    # [START securitycenter_add_security_marks]
+    # [START securitycenter_add_finding_security_marks]
     # [START add_marks_to_finding]
     from google.cloud import securitycenter
     from google.protobuf import field_mask_pb2
@@ -145,7 +145,7 @@ def add_to_finding(finding_name):
         }
     )
     # [END add_marks_to_finding]
-    # [END securitycenter_add_security_marks]
+    # [END securitycenter_add_finding_security_marks]
     return updated_marks, marks