build(deps): bump pytz from 2025.1 to 2025.2

Bumps [pytz](https://github.com/stub42/pytz) from 2025.1 to 2025.2.
- [Release notes](https://github.com/stub42/pytz/releases)
- [Commits](stub42/pytz@release_2025.1...release_2025.2)

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

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements.txt

@@ -1,7 +1,7 @@
 discord.py==2.5.0
 Pillow==11.1.0
 xkcd==2.4.2
-pytz==2025.1
+pytz==2025.2
 asyncpg==0.30.0
 python-Levenshtein==0.26.1
 pillow-heif==0.21.0