doc: fix small typo error

PR-URL: #46186
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Harshitha K P <harshitha014@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>

src/README.md

@@ -34,7 +34,7 @@ Important concepts when using V8 are the ones of [`Isolate`][]s and
 ## libuv API documentation
 
 The other major dependency of Node.js is [libuv][], providing
-the [event loop][] and other operation system abstractions to Node.js.
+the [event loop][] and other operating system abstractions to Node.js.
 
 There is a [reference documentation for the libuv API][].