skipper: update canary to v0.21.86

[Changes](zalando/skipper@v0.21.76...v0.21.86)

* zalando/skipper#3067
* zalando/skipper#3066
* zalando/skipper#3060
* zalando/skipper#3061
* zalando/skipper#3062
* zalando/skipper#3063
* zalando/skipper#3064
* zalando/skipper#3057
* zalando/skipper#3055
* zalando/skipper#3053

See closed #7450
Signed-off-by: Alexander Yastrebov <alexander.yastrebov@zalando.de>

cluster/manifests/skipper/deployment.yaml

@@ -1,5 +1,5 @@
 {{ $internal_version := "v0.21.76-905" }}
-{{ $canary_internal_version := "v0.21.76-905" }}
+{{ $canary_internal_version := "v0.21.86-915" }}
 
 {{/* Optional canary arguments separated by "[cf724afc]" to allow whitespaces, e.g. "-foo=has a whitespace[cf724afc]-baz=qux" */}}
 {{ $canary_args := "" }}