Add short blog post about regex 1.9 release (#1119)

Author: BurntSushi

posts/2023-07-05-regex-1.9.md

@@ -0,0 +1,31 @@
+---
+layout: post
+title: "Announcing regex 1.9"
+author: Andrew Gallant
+team: The regex crate team <https://www.rust-lang.org/governance/teams/library#Regex%20crate%20team>
+---
+
+The regex sub-team is announcing the release of `regex 1.9`. The `regex` crate
+is maintained by the Rust project and is the recommended way to use regular
+expressions in Rust. Its defining characteristic is its guarantee of worst case
+linear time searches with respect to the size of the string being searched.
+
+Releases of the `regex` crate aren't normally announced on this blog, but
+since the majority of its internals have been rewritten in version 1.9, this
+announcement serves to encourage extra scrutiny. If you run into any problems
+or performance regressions, please report them on the [issue tracker] or [ask
+questions on the Discussion forum][discussions].
+
+Few API additions have been made, but one worth calling out is the
+[`Captures::extract`] method that should make getting capture groups in some
+cases more convenient. Otherwise, the main change folks should see is hopefully
+faster search times.
+
+You can read more in the [CHANGELOG] and in a more in depth blog post on
+[regex crate internals as a library][regex-internals].
+
+[issue tracker]: https://github.com/rust-lang/regex/issues
+[discussions]: https://github.com/rust-lang/regex/discussions
+[`Captures::extract`]: https://docs.rs/regex/1.*/regex/struct.Captures.html#method.extract
+[CHANGELOG]: https://github.com/rust-lang/regex/blob/master/CHANGELOG.md#190-2023-07-05
+[regex-internals]: https://blog.burntsushi.net/regex-internals/