[pip](deps): Bump pygit2 from 1.15.0 to 1.15.1 (#149)

Bumps [pygit2](https://github.com/libgit2/pygit2) from 1.15.0 to 1.15.1.
- [Changelog](https://github.com/libgit2/pygit2/blob/master/CHANGELOG.md)
- [Commits](libgit2/pygit2@v1.15.0...v1.15.1)

---
updated-dependencies:
- dependency-name: pygit2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

poetry.lock

@@ -14,7 +14,7 @@ winloop = {markers = "sys_platform == \"win32\"", version = "^0.1.4"}
 asyncpg = "^0.29.0"
 discord-ext-menus = {git = "https://github.com/Rapptz/discord-ext-menus", rev = "8686b5d1bbc1d3c862292eb436ab630d6e9c9b53"}
 psutil = "^6.0.0"
-pygit2 = "^1.15.0"
+pygit2 = "^1.15.1"
 python-dateutil = "^2.9.0"
 click = "^8.1.7"
 async-lru = "^2.0.4"