Bump pillow from 8.4.0 to 9.3.0 in /speech/conformer/pytorch

Bumps [pillow](https://github.com/python-pillow/Pillow) from 8.4.0 to 9.3.0.
- [Release notes](https://github.com/python-pillow/Pillow/releases)
- [Changelog](https://github.com/python-pillow/Pillow/blob/main/CHANGES.rst)
- [Commits](python-pillow/Pillow@8.4.0...9.3.0)

---
updated-dependencies:
- dependency-name: pillow
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

speech/conformer/pytorch/requirements.txt

@@ -5,7 +5,7 @@ pyyaml==5.4.1
 pandas==1.1.5
 wandb==0.12.8
 protobuf==3.19.4
-pillow==8.4.0
+pillow==9.3.0
 pytest==6.2.5
 editdistance==0.5.2
 horovod==0.24.0