chore(deps): update mccutchen/go-httpbin docker tag to v2.18.3 (#427)

Co-authored-by: Renovate Bot <[email protected]>

Author: soerenschneider

apps/httpbin/deployment.yaml

@@ -28,7 +28,7 @@ spec:
           type: RuntimeDefault
       containers:
         - name: httpbin
-          image: mccutchen/go-httpbin:2.18.1
+          image: mccutchen/go-httpbin:2.18.3
           imagePullPolicy: IfNotPresent
           securityContext:
             runAsNonRoot: true