Many small bug fixes

What's Changed

• Fix a broken error message in assign by @johnlees in #246
• Updates for GPU analysis + documentation by @nickjcroucher in #251
• Path fix for distance plot, update docs with new DB page by @johnlees in #252
• Increase default mandrake maxiter by 10x by @johnlees in #256
• Correct database content filenames by @HarryHung in #257
• Iterative PopPUNK updates by @BZhao95 in #259
• Fix for using visualise with indiv refine ref-db by @johnlees in #261
• Update Git Repository link by @HarryHung in #271
• Improve manual installation instruction by @HarryHung in #274
• Update CI to new mamba action by @johnlees in #272
• Fix overwrite, correct error messages by @HarryHung in #282
• API change in mpl380 ellipses by @johnlees in #285
• Allow overwrite if forced by @johnlees in #279
• Remove deprecated system packages from readthedocs build by @johnlees in #286

New Contributors

• @HarryHung made their first contribution in #257

Full Changelog: v2.6.0...v2.6.1