Removing erroneous backtick in docs

docs/sources/auth/auth-proxy.md

@@ -34,7 +34,7 @@ ldap_sync_ttl = 60
 # Example `whitelist = 192.168.1.1, 192.168.1.0/24, 2001::23, 2001::0/120`
 whitelist =
 # Optionally define more headers to sync other user attributes
-# Example `headers = Name:X-WEBAUTH-NAME Email:X-WEBAUTH-EMAIL``
+# Example `headers = Name:X-WEBAUTH-NAME Email:X-WEBAUTH-EMAIL`
 headers =
 ```