issue should be integer and not string in changelog

.chloggen/lbexporter-return-hostnames-k8s-resolver.yaml

@@ -10,7 +10,7 @@ component: loadbalancingexporter
 note: Adds a an optional configuration to the k8s resolver which returns hostnames instead of IPs for headless services pointing at statefulsets
 
 # Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
-issues: ["18412"]
+issues: [18412]
 
 # (Optional) One or more lines of additional information to render under the primary note.
 # These lines will be padded with 2 spaces and then inserted directly into the document.