Merge branch 'renovate/kubernetes-21.x' into 'main'

Update dependency kubernetes to v21

See merge request stackspin/stackspin!692

requirements.txt

@@ -46,7 +46,7 @@ jinja2==3.0.3
     #   jinja2-base64-filters
 jinja2-base64-filters==0.1.4
     # via -r requirements.in
-kubernetes==20.13.0
+kubernetes==21.7.0
     # via -r requirements.in
 markupsafe==2.0.1
     # via jinja2