Bump urllib3 from 1.25.9 to 1.26.5

Bumps [urllib3](https://github.com/urllib3/urllib3) from 1.25.9 to 1.26.5.
- [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/1.25.9...1.26.5)

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

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

requirements.txt

@@ -140,7 +140,7 @@ Twisted==19.7.0
 twitter==1.18.0
 typed-ast==1.4.0
 uritemplate==3.0.0
-urllib3==1.25.9
+urllib3==1.26.5
 urwid==2.0.1
 vim-vint==0.3.21
 virtualenv-clone==0.5.3
@@ -260,7 +260,7 @@ tornado==6.0.3
 traitlets==4.3.3
 typed-ast==1.4.0
 uritemplate==3.0.0
-urllib3==1.25.9
+urllib3==1.26.5
 virtualenv==16.7.7
 virtualenv-clone==0.5.3
 w3lib==1.21.0