Update MSRV in README too

Author: sirhcel

README.md

@@ -98,7 +98,7 @@ reliability) and seeks to operate with a minimum of overhead.
 
 ## Minimum Supported Rust Version (MSRV)
 
-This crate is guaranteed to compile on stable Rust 1.26.2 and up. It *might*
+This crate is guaranteed to compile on stable Rust 1.75.0 and up. It *might*
 compile with older versions but that may change in any new patch release.
 
 ## Contributing