build: bump azure-identity in /src/ContentProcessorAPI

Bumps [azure-identity](https://github.com/Azure/azure-sdk-for-python) from 1.20.0 to 1.21.0.
- [Release notes](https://github.com/Azure/azure-sdk-for-python/releases)
- [Changelog](https://github.com/Azure/azure-sdk-for-python/blob/main/doc/esrp_release.md)
- [Commits](Azure/azure-sdk-for-python@azure-identity_1.20.0...azure-identity_1.21.0)

---
updated-dependencies:
- dependency-name: azure-identity
  dependency-version: 1.21.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

src/ContentProcessorAPI/requirements.txt

@@ -12,9 +12,9 @@ azure-appconfiguration==1.7.1 \
 azure-core==1.33.0 \
     --hash=sha256:9b5b6d0223a1d38c37500e6971118c1e0f13f54951e6893968b38910bc9cda8f \
     --hash=sha256:f367aa07b5e3005fec2c1e184b882b0b039910733907d001c20fb08ebb8c0eb9
-azure-identity==1.20.0 \
-    --hash=sha256:40597210d56c83e15031b0fe2ea3b26420189e1e7f3e20bdbb292315da1ba014 \
-    --hash=sha256:5f23fc4889a66330e840bd78830287e14f3761820fe3c5f77ac875edcb9ec998
+azure-identity==1.22.0 \
+    --hash=sha256:26d6c63f2ca453c77c3e74be8613941ad074e05d0c8be135247573752c249ad8 \
+    --hash=sha256:c8f5ef23e5295c2fa300c984dd9f5e1fe43503fc25c121c37ff6a15e39b800b9
 azure-storage-blob==12.25.1 \
     --hash=sha256:1f337aab12e918ec3f1b638baada97550673911c4ceed892acc8e4e891b74167 \
     --hash=sha256:4f294ddc9bc47909ac66b8934bd26b50d2000278b10ad82cc109764fdc6e0e3b