fixed drift check type issue and string literal deprecation

🐛 Bug Fixes

• Fixed issue in drift_check() where data do not have a timestamp and the index of analysis was being treated as a pandas Series. It is now a numpy array for consistency and better compatibility with the statsmodels package.
• Updated analyte indexing for regex deprecation warning related to string literals.

📚 Documentation

• Updated Basic Usage page to reflect new uncertainty output implemented in v0.0.10