Fix issue with initial_version calculation

Author: MaciejKaras

scripts/release/release_notes.py

@@ -63,11 +63,10 @@ def calculate_next_version_with_changelog(
     changelog: list[ChangeEntry] = get_changelog_entries(previous_version_commit, repo, changelog_sub_path)
     changelog_kinds = list(set(entry.kind for entry in changelog))
 
-    # If there is no previous version tag, we start with the initial version tag
-    if not previous_version_tag:
-        version = initial_version
-    else:
-        version = calculate_next_release_version(previous_version_tag.name, changelog_kinds)
+    # Use initial version if no previous tag exists, otherwise use the tag name
+    previous_version = previous_version_tag.name if previous_version_tag else initial_version
+
+    version = calculate_next_release_version(previous_version, changelog_kinds)
 
     return version, changelog