Bump urllib3 from 1.26.20 to 2.6.3

Bumps [urllib3](https://github.com/urllib3/urllib3) from 1.26.20 to 2.6.3.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/main/CHANGES.rst)
- [Commits](https://github.com/urllib3/urllib3/compare/1.26.20...2.6.3)

---
updated-dependencies:
- dependency-name: urllib3
  dependency-version: 2.6.3
  dependency-type: direct:production
...

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

pyproject.toml

@@ -58,7 +58,7 @@ dependencies = [
     "svg2rlg~=0.3",
     "tini~=3.0.1",
     "tornado~=6.3",
-    "urllib3~=1.26.19",
+    "urllib3~=2.6.3",
     "whitenoise~=5.2.0",
     "yolk~=0.4.3",
     "zipp~=3.4.0",