chore(deps): update docker.elastic.co/ci-agent-images/pipelib docker tag to v0.22.0 (#227)

Co-authored-by: elastic-renovate-prod[bot] <174716857+elastic-renovate-prod[bot]@users.noreply.github.com>
Co-authored-by: Josh Mock <[email protected]>

Author: elastic-renovate-prod[bot]

.buildkite/pipeline.yml

@@ -14,10 +14,10 @@ steps:
               label: "Verify Renovate configuration"
               command: "renovate-config-validator"
               agents:
-                image: "docker.elastic.co/ci-agent-images/pipelib:0.15.0@sha256:753c420cf254a7ed0be658ab153965e0708fe0636dfe2fe57e6e4ae0972bb681"
+                image: "docker.elastic.co/ci-agent-images/pipelib:0.22.0@sha256:25503116fb91c18383b17aee528b9ca6e520ef58622c7f961c7d255bb8ba51f6"
           # if our catalog-info.yaml is changed, make sure it's well-formed according to our internal standards as well as Backstage's validation
           - path: "catalog-info.yaml"
             config:
               command: "/agent/check-catalog-info.sh"
               agents:
-                image: "docker.elastic.co/ci-agent-images/pipelib:0.15.0@sha256:753c420cf254a7ed0be658ab153965e0708fe0636dfe2fe57e6e4ae0972bb681"
+                image: "docker.elastic.co/ci-agent-images/pipelib:0.22.0@sha256:25503116fb91c18383b17aee528b9ca6e520ef58622c7f961c7d255bb8ba51f6"