Bump aiohttp from 3.8.5 to 3.9.0 in /examples/k8s_dask_plugin

Bumps [aiohttp](https://github.com/aio-libs/aiohttp) from 3.8.5 to 3.9.0.
- [Release notes](https://github.com/aio-libs/aiohttp/releases)
- [Changelog](https://github.com/aio-libs/aiohttp/blob/master/CHANGES.rst)
- [Commits](aio-libs/aiohttp@v3.8.5...v3.9.0)

---
updated-dependencies:
- dependency-name: aiohttp
  dependency-type: indirect
...

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

examples/k8s_dask_plugin/requirements.txt

@@ -8,7 +8,7 @@ adlfs==2023.8.0
     # via flytekit
 aiobotocore==2.5.4
     # via s3fs
-aiohttp==3.8.5
+aiohttp==3.9.0
     # via
     #   adlfs
     #   aiobotocore
@@ -20,8 +20,6 @@ aiosignal==1.3.1
     # via aiohttp
 arrow==1.2.3
     # via cookiecutter
-async-timeout==4.0.3
-    # via aiohttp
 attrs==23.1.0
     # via aiohttp
 azure-core==1.29.3
@@ -52,9 +50,7 @@ cffi==1.15.1
 chardet==5.2.0
     # via binaryornot
 charset-normalizer==3.2.0
-    # via
-    #   aiohttp
-    #   requests
+    # via requests
 click==8.1.7
     # via
     #   cookiecutter