chore(deps): bump b2sdk from 2.8.1 to 2.9.3

Bumps [b2sdk](https://github.com/Backblaze/b2-sdk-python) from 2.8.1 to 2.9.3.
- [Release notes](https://github.com/Backblaze/b2-sdk-python/releases)
- [Changelog](https://github.com/Backblaze/b2-sdk-python/blob/master/CHANGELOG.md)
- [Commits](Backblaze/b2-sdk-python@v2.8.1...v2.9.3)

---
updated-dependencies:
- dependency-name: b2sdk
  dependency-version: 2.9.3
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

requirements/main.txt

@@ -66,9 +66,9 @@ automat==25.4.16 \
     --hash=sha256:0017591a5477066e90d26b0e696ddc143baafd87b588cfac8100bc6be9634de0 \
     --hash=sha256:04e9bce696a8d5671ee698005af6e5a9fa15354140a87f4870744604dcdd3ba1
     # via -r requirements/main.in
-b2sdk==2.8.1 \
-    --hash=sha256:0fac6559f9b8ac0bc603b86ae5367724099cde8975efd7a3dd3fb33e21085eb4 \
-    --hash=sha256:f75d9980259a42915228c3deee475b2b7d5bc252d8c3228a8c3727ad9c68a343
+b2sdk==2.9.3 \
+    --hash=sha256:098063300fbafbc0af6fb4b522fbf84a49ff49c3037032a2349e5bba10f5fff5 \
+    --hash=sha256:d8f94b3ca2f91852439673d27d6436b353dba1fc8db6b960f3d26c17539574ae
     # via -r requirements/main.in
 babel==2.17.0 \
     --hash=sha256:0c54cffb19f690cdcc52a3b50bcbf71e07a808d1c80d549f2459b9d2cf0afb9d \