Advertise support for qBittorrent v4.6.0

[rmartin16]

Release Checklist

• [x] Bump version number in setup.cfg
• [x] Update CHANGELOG
• [x] Update qBittorrent version/link in docs/source/introduction
• [x] Update qBittorrent version/link in README
• [x] Update LATEST_QBT_VER in CI
• [x] Add previous version to QBT_VER in CI if any tests depend on that version
• [x] Add new version to _version_support.py

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (02dd2d8) 100.00% compared to head (0f455a0) 100.00%.

:exclamation: Current head 0f455a0 differs from pull request most recent head 5d485b9. Consider uploading reports for the commit 5d485b9 to get more accurate results

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #357 +/- ## ========================================= Coverage 100.00% 100.00% ========================================= Files 14 14 Lines 1977 1977 Branches 365 365 ========================================= Hits 1977 1977 ``` | [Files](https://app.codecov.io/gh/rmartin16/qbittorrent-api/pull/357?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Russell+Martin) | Coverage Δ | | |---|---|---| | [src/qbittorrentapi/\_version\_support.py](https://app.codecov.io/gh/rmartin16/qbittorrent-api/pull/357?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Russell+Martin#diff-c3JjL3FiaXR0b3JyZW50YXBpL192ZXJzaW9uX3N1cHBvcnQucHk=) | `100.00% <100.00%> (ø)` | |

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.