Update psutil requirement from >=5.9.0 to >=7.2.2 in /src/a2a

Updates the requirements on [psutil](https://github.com/giampaolo/psutil) to permit the latest version.
- [Changelog](https://github.com/giampaolo/psutil/blob/master/docs/changelog.rst)
- [Commits](giampaolo/psutil@v5.9.0...v7.2.2)

---
updated-dependencies:
- dependency-name: psutil
  dependency-version: 7.2.2
  dependency-type: direct:production
...

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

Author: dependabot[bot]

src/a2a/requirements_a2a.txt

@@ -1,10 +1,10 @@
-fastapi>=0.104.0
+fastapi>=0.104.0
 uvicorn[standard]>=0.24.0
 starlette>=0.27.0
 pydantic>=2.5.0
 aiofiles>=23.2.0
 httpx>=0.25.0
-psutil>=5.9.0
+psutil>=7.2.2
 prometheus-client>=0.19.0
 gunicorn>=21.2.0
 aiosignal>=1.3.0