Bump urllib3 from 2.2.1 to 2.2.2 in /images/singleuser-sample

Bumps [urllib3](https://github.com/urllib3/urllib3) from 2.2.1 to 2.2.2.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/main/CHANGES.rst)
- [Commits](urllib3/urllib3@2.2.1...2.2.2)

---
updated-dependencies:
- dependency-name: urllib3
  dependency-type: indirect
...

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

Author: dependabot[bot]

images/singleuser-sample/requirements.txt

@@ -101,7 +101,6 @@ jsonpointer==3.0.0
     # via jsonschema
 jsonschema[format-nongpl]==4.22.0
     # via
-    #   jsonschema
     #   jupyter-events
     #   jupyterlab-server
     #   nbformat
@@ -322,7 +321,7 @@ typing-extensions==4.12.2
     #   sqlalchemy
 uri-template==1.3.0
     # via jsonschema
-urllib3==2.2.1
+urllib3==2.2.2
     # via requests
 wcwidth==0.2.13
     # via prompt-toolkit