Bump urllib3 from 1.24.2 to 1.26.5

Bumps [urllib3](https://github.com/urllib3/urllib3) from 1.24.2 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@1.24.2...1.26.5)

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

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

Author: dependabot[bot]

intro-mdp/requirements.txt

@@ -3,5 +3,5 @@ ncclient==0.6.4
 netmiko==1.4.2
 pyang==1.7.4
 requests==2.18.4
-urllib3==1.22
+urllib3==1.26.5
 xmltodict==0.11.0

intro-nfvis/requirements.txt

@@ -1,3 +1,3 @@
 ciscosparkapi==0.9.2
 requests==2.18.4
-urllib3==1.22
+urllib3==1.26.5

requirements.txt

@@ -3,7 +3,7 @@ ncclient==0.6.0
 netmiko==1.4.2
 pyang==1.7.4
 requests==2.20.0
-urllib3==1.24.2
+urllib3==1.26.5
 xmltodict==0.11.0
 ansible==2.5.4
 PrettyTable==0.7.2

verify/requirements.txt

@@ -2,4 +2,4 @@ ciscosparkapi==0.9.2
 ncclient==0.6.2
 netmiko==1.4.2
 requests==2.18.4
-urllib3==1.22
+urllib3==1.26.5