Update pub_macro_rules since version

Author: spastorino

compiler/rustc_feature/src/active.rs

@@ -639,7 +639,7 @@ declare_features! (
     (active, macro_attributes_in_derive_output, "1.51.0", Some(81119), None),
 
     /// Allows `pub` on `macro_rules` items.
-    (active, pub_macro_rules, "1.49.0", Some(78855), None),
+    (active, pub_macro_rules, "1.52.0", Some(78855), None),
 
     // -------------------------------------------------------------------------
     // feature-group-end: actual feature gates