Merge pull request #8437 from zalando-incubator/skipper/update-main-v0.21.220

skipper: update main to v0.21.220

Author: RomanZavodskikh

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:" "v0.21.216-1038" }}
+{{ $main_image := print "container-registry.zalando.net/teapot/skipper-internal:" "v0.21.220-1043" }}
 {{ $canary_image := "container-registry.zalando.net/teapot/skipper-internal:v0.21.220-1043" }}