Bump django from 3.0.5 to 3.0.7 in /docs/samples/explanation/aix/mnist (

kubeflow#1109)

Bumps [django](https://github.com/django/django) from 3.0.5 to 3.0.7.
- [Release notes](https://github.com/django/django/releases)
- [Commits](django/django@3.0.5...3.0.7)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

docs/samples/explanation/aix/mnist/requirements.txt

@@ -14,7 +14,7 @@ cycler==0.10.0
 decorator==4.4.2
 defusedxml==0.6.0
 dill==0.3.1.1
-Django==3.0.5
+Django==3.0.7
 docutils==0.16
 ecos==2.0.7.post1
 entrypoints==0.3