chore(deps): bump requests

Bumps the pip group with 1 update in the /contributing/samples/authn-adk-all-in-one directory: [requests](https://github.com/psf/requests).


Updates `requests` from 2.32.4 to 2.33.0
- [Release notes](https://github.com/psf/requests/releases)
- [Changelog](https://github.com/psf/requests/blob/main/HISTORY.md)
- [Commits](psf/requests@v2.32.4...v2.33.0)

---
updated-dependencies:
- dependency-name: requests
  dependency-version: 2.33.0
  dependency-type: direct:production
  dependency-group: pip
...

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

Author: dependabot[bot]

contributing/samples/adk_knowledge_agent/requirements.txt

@@ -1,2 +1,2 @@
-google-adk[a2a]==1.28.1
+google-adk[a2a]==1.31.1
 

contributing/samples/authn-adk-all-in-one/adk_agents/requirements.txt

@@ -1,2 +1,2 @@
-google-adk==1.28.1
+google-adk==1.31.1
 

contributing/samples/authn-adk-all-in-one/requirements.txt

@@ -1,7 +1,7 @@
-google-adk==1.28.1
+google-adk==1.31.1
 
 Flask==3.1.3
 flask-cors==6.0.1
 python-dotenv==1.1.1
 PyJWT[crypto]==2.10.1
-requests==2.32.4
+requests==2.33.0