Bump pillow in /content/_code-samples/airgapped-wallet/py

Bumps [pillow](https://github.com/python-pillow/Pillow) from 8.3.1 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](https://github.com/python-pillow/Pillow/compare/8.3.1...9.3.0)

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

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

content/_code-samples/airgapped-wallet/py/requirements.txt

@@ -13,7 +13,7 @@ httpx==0.18.2
 idna==3.2
 image==1.5.33
 pifacedigitalio==3.0.5
-Pillow==8.3.1
+Pillow==9.3.0
 pycparser==2.20
 pytz==2021.1
 qrcode==7.2