textproc/ripgrep: Fix build with rust 1.71.0

Summary:
Do not abort if documentation is missing.

error: missing documentation for an extern crate
  --> crates/grep/src/lib.rs:17:1
   |
17 | pub extern crate grep_cli as cli;
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |

PR:		272602
Reviewed by:	mikael
Approved by:	portmgr (build fix blanket)
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D41095

textproc/ripgrep/files/patch-crates_grep_src_lib.rs

@@ -0,0 +1,11 @@
+--- crates/grep/src/lib.rs.orig	2023-07-19 16:11:20 UTC
++++ crates/grep/src/lib.rs
+@@ -12,7 +12,7 @@ A cookbook and a guide are planned.
+ A cookbook and a guide are planned.
+ */
+
+-#![deny(missing_docs)]
++//#![deny(missing_docs)]
+
+ pub extern crate grep_cli as cli;
+ pub extern crate grep_matcher as matcher;