fix: fix update_zuul_project_config script

Some of the previous changes broken update_zuul_project_config part of
the script responsible for verifying required zuul template is present.
It is verifying that, but mistankengly not raising a flag that update is
required.

test-requirements.txt

@@ -4,4 +4,4 @@
 
 stestr>=2.0.0 # Apache-2.0
 testtools>=2.2.0 # MIT
-flake8
+flake8>=6.0

tools/update_zuul_project_configs.py

@@ -149,8 +149,9 @@ def process_repositories(args, service):
             "-hc-int-jobs" if args.environment == "internal" else "-hc-jobs"
         )
         for doc in data.docs_by_service_type(service["service_type"]):
-            logging.debug(f"Analyzing document {doc}")
+            logging.info("Analyzing document %s" % doc)
             if not doc.get("type"):
+                logging.debug("Skipping unsupported type")
                 continue
             if doc["type"] == "dev":
                 doc_type = "dev-guide"
@@ -158,7 +159,11 @@ def process_repositories(args, service):
                 doc_type = doc["type"]
             template_name = f"{doc_type}{job_suffix}"
             if doc_type in ["api-ref", "umn", "dev-guide"]:
+                logging.debug(
+                    "Ensuring required zuul template %s is present" % template_name)
                 if template_name not in zuul_templates:
+                    logging.debug("Adding template %s" % template_name)
+                    zuul_config_updated = True
                     zuul_templates.append(template_name)
             else:
                 job_name = f"build-otc-{doc['service_type']}-{doc_type}"
@@ -245,6 +250,8 @@ def process_repositories(args, service):
                         head=branch_name,
                     ),
                 )
+        else:
+            logging.info("No update is necessary")
 
 
 def main():