fix: secreteKey to secretKey

I was copying and using it as it is and encountered an error.. I think the secret key is correct.

docs/modules/examples/pages/maven/maven-central.adoc

@@ -707,7 +707,7 @@ jreleaser {
         armored = true
         mode = 'FILE'
         publicKey = 'path/to/public.pgp'
-        secreteKey = 'path/to/private.pgp'
+        secretKey = 'path/to/private.pgp'
     }
 }
 ----