Bump urllib3 from 1.25.5 to 1.26.5

Bumps [urllib3](https://github.com/urllib3/urllib3) from 1.25.5 to 1.26.5.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/main/CHANGES.rst)
- [Commits](urllib3/urllib3@1.25.5...1.26.5)

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

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

requirements.txt

@@ -1,4 +1,4 @@
-urllib3==2.0.2
+urllib3==1.26.5
 requests_cache==1.0.1
 ckanapi>=3.5
 flask==2.3.2

setup.py

@@ -31,7 +31,7 @@
     include_package_data = True,
     zip_safe = False,
     install_requires=[
-        'urllib3==1.25.5',       # avoid caching bug
+        'urllib3==1.26.5',       # avoid caching bug
         'requests_cache==0.9.8', # avoid caching bug
         'ckanapi>=3.5',
         'flask>=2.1.2',