Update release-notes/breaking-changes/elastic-apm.md

Co-authored-by: Colleen McGinnis <[email protected]>

Author: carsonip

release-notes/breaking-changes/elastic-apm.md

@@ -27,7 +27,7 @@ To learn how to upgrade, check out <uprade docs>.
 % **Action**<br> Steps for mitigating deprecation impact.
 % ::::
 
-::::{dropdown} Change server information endpoint / to only accept GET and HEAD requests
+::::{dropdown} Change server information endpoint "/" to only accept GET and HEAD requests
 This will surface any agent misconfiguration causing data to be sent to `/` instead of the correct endpoint, e.g. `/v1/traces` for OTLP/HTTP.
 For more information, check [PR #15976](https://github.com/elastic/apm-server/pull/15976).
 **Impact**<br> Any methods other than GET and HEAD to `/` will return HTTP 405 Method Not Allowed.