doc: fix typo

Refs: #31169
PR-URL: #31675
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

doc/api/deprecations.md

@@ -529,7 +529,7 @@ changes:
 
 Type: End-of-Life
 
-The `os.tmpDir()` API iws deprecated in Node.js 7.0.0 and has since been
+The `os.tmpDir()` API was deprecated in Node.js 7.0.0 and has since been
 removed. Please use [`os.tmpdir()`][] instead.
 
 <a id="DEP0023"></a>