chore: fix semantic-release changelog configuration deprecation (#31)

Update changelog configuration to use the new structure:
- Move 'changelog_file' to 'changelog.default_templates.changelog_file'
- Prevents deprecation warning in python-semantic-release 9.x
- Ensures compatibility with future v10 release

Author: ckrough

pyproject.toml

@@ -142,12 +142,14 @@ match = "main"
 prerelease = false
 
 [tool.semantic_release.changelog]
-changelog_file = "CHANGELOG.md"
 exclude_commit_patterns = [
     "chore\\(release\\):.*",
     "Merge.*",
 ]
 
+[tool.semantic_release.changelog.default_templates]
+changelog_file = "CHANGELOG.md"
+
 [tool.semantic_release.changelog.environment]
 block_start_string = "{%"
 block_end_string = "%}"