Bump urllib3 from 1.25.11 to 1.26.0

Bumps [urllib3](https://github.com/urllib3/urllib3) from 1.25.11 to 1.26.0.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/master/CHANGES.rst)
- [Commits](https://github.com/urllib3/urllib3/compare/1.25.11...1.26.0)

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

automated_detection_testing/requirements.txt

@@ -65,7 +65,7 @@ splunk-sdk==1.6.14
 tabulate==0.8.7
 termcolor==1.1.0
 toml==0.10.2
-urllib3==1.25.11
+urllib3==1.26.0
 virtualenv==20.1.0
 wcwidth==0.2.5
 wget==3.2

requirements.txt

@@ -37,7 +37,7 @@ stix2-patterns==1.3.1
 taxii2-client==2.2.2
 toml==0.10.2
 typing==3.7.4.3
-urllib3==1.25.11
+urllib3==1.26.0
 virtualenv==20.1.0
 zipp==3.4.0
 coloredlogs==14.0