Improve comment and pattern matching

Author: vdusek

scripts/check_version_in_changelog.py

@@ -15,9 +15,10 @@
 
     with open(CHANGELOG_PATH, encoding='utf-8') as changelog_file:
         for line in changelog_file:
-            # The heading for the changelog entry for the given version can start with either the version number,
-            # or the version number in a link
-            if re.match(rf'(## )\[?{current_package_version}([\] ]|$)', line):
+            # Ensure that the heading in the changelog entry for the specified version includes a version number
+            # enclosed in square brackets. This version number is formatted as a link to the corresponding
+            # version tag on GitHub.
+            if re.match(rf'## \[{current_package_version}\].*$', line):
                 break
         else:
             raise RuntimeError(