[Rspamd] Fix groups.conf syntax

data/conf/rspamd/local.d/groups.conf

@@ -1,6 +1,14 @@
-symbol "MAILCOW_AUTH" {
-  description = "mailcow authenticated";
-  score = -20.0;
+symbols {
+  symbol "MAILCOW_AUTH" {
+    description = "mailcow authenticated";
+    score = -20.0;
+  }
+  symbol "CTYPE_MIXED_BOGUS" {
+    score = 0.0;
+  }
+  symbol "BAD_REP_POLICIES" {
+    score = 2.5;
+  }
 }
 
 group "MX" {
@@ -20,11 +28,3 @@ group "MX" {
     one_shot = true;
   }
 }
-
-symbol "CTYPE_MIXED_BOGUS" {
-  score = 0.0;
-}
-
-symbol "BAD_REP_POLICIES" {
-  score = 2.5;
-}