build(deps): bump urllib3 from 1.26.3 to 1.26.4 in /images/proxy-patches

Bumps [urllib3](https://github.com/urllib3/urllib3) from 1.26.3 to 1.26.4.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/main/CHANGES.rst)
- [Commits](urllib3/urllib3@1.26.3...1.26.4)

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

Author: dependabot[bot]

images/proxy-patches/requirements.txt

@@ -12,5 +12,5 @@ idna==2.10
     # via requests
 requests==2.25.1
     # via -r requirements.in
-urllib3==1.26.3
+urllib3==1.26.4
     # via requests