Add asterisk check to check-signatures-format.py

_data/signed/The_Quantum_Alpha.yaml

@@ -1,2 +1,2 @@
-name: The Quantum Alpha (*Private*)
+name: The Quantum Alpha (Private)
 link: https://gitlab.com/The_Quantum_Alpha

check-signatures-format.py

@@ -75,6 +75,9 @@ for file_name in sorted(os.listdir("_data/signed")):
             report(f"{file_name} contains an empty '{key}:' on line {i + 1}, please fix this.")
             continue
 
+        if "*" in value:
+            report(f"{file_name} contains an asterisk on line {i + 1}. The signatures are not rendered as Markdown, so formatting won't work. Please remove the asterisk.")
+
         if key.lower() in existing_keys:
             report(f"{file_name} contains duplicate key '{key}'.")
         existing_keys[key.lower()] = i