Merge pull request #9345 from zalando-incubator/skipper/update-main-v0.22.21

skipper: update main to v0.22.21

Author: AlexanderYastrebov

cluster/manifests/skipper/deployment.yaml

@@ -1,6 +1,6 @@
 {{/* image-updater-bot detects *image variables so use print to disable it for main image */}}
 
-{{ $main_image := print "container-registry.zalando.net/teapot/skipper-internal:" "v0.22.7-1117" }}
+{{ $main_image := print "container-registry.zalando.net/teapot/skipper-internal:" "v0.22.21-1130" }}
 {{ $canary_image := "container-registry.zalando.net/teapot/skipper-internal:v0.22.21-1130" }}
 
 {{/* Optional canary arguments separated by "[cf724afc]" to allow whitespaces, e.g. "-foo=has a whitespace[cf724afc]-baz=qux" */}}