[third-party/rust] Update proc-macro-error to proc-macro-error2

Summary: The `proc-macro-error` crate is unmaintained and only compatible with syn 1. `proc-macro-error2` supports syn 2.

Test Plan: `fbgs third-party/rust:proc-macro-error -l | sed 's,^fbsource/,,' | xargs arc rust-check`

Reviewed By: cjlongoria

Differential Revision: D93949190

fbshipit-source-id: a915f13147571c2fb664e3b23454118211826820

Author: David Tolnay

antlir/antlir2/antlir2_facts/BUCK

@@ -49,7 +49,7 @@ rust_library(
     crate_root = "macro.rs",
     proc_macro = True,
     deps = [
-        "proc-macro-error",
+        "proc-macro-error2",
         "proc-macro2",
         "quote",
         "syn",

antlir/antlir2/antlir2_facts/macro.rs

@@ -5,8 +5,8 @@
  * LICENSE file in the root directory of this source tree.
  */
 
-use proc_macro_error::abort;
-use proc_macro_error::proc_macro_error;
+use proc_macro_error2::abort;
+use proc_macro_error2::proc_macro_error;
 use quote::ToTokens;
 use quote::format_ident;
 use quote::quote;