Bump praw from 7.7.1 to 7.8.1 in /src (#51)

Bumps [praw](https://github.com/praw-dev/praw) from 7.7.1 to 7.8.1.
- [Release notes](https://github.com/praw-dev/praw/releases)
- [Changelog](https://github.com/praw-dev/praw/blob/master/CHANGES.rst)
- [Commits](praw-dev/praw@v7.7.1...v7.8.1)

---
updated-dependencies:
- dependency-name: praw
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

src/requirements.txt

@@ -30,7 +30,7 @@ idna==3.10
     #   anyio
     #   httpx
     #   requests
-praw==7.7.1
+praw==7.8.1
     # via -r requirements.in
 prawcore==2.4.0
     # via praw