doc: fix typo occuring -> occurring

PR-URL: #17350
Reviewed-By: Yosuke Furukawa <yosuke.furukawa@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Daniel Bevenius <daniel.bevenius@gmail.com>
Reviewed-By: Vse Mozhet Byt <vsemozhetbyt@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Jon Moss <me@jonathanmoss.me>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

Author: Leko

doc/api/util.md

@@ -657,7 +657,7 @@ supported encodings or an alias.
 * Returns: {string}
 
 Decodes the `input` and returns a string. If `options.stream` is `true`, any
-incomplete byte sequences occuring at the end of the `input` are buffered
+incomplete byte sequences occurring at the end of the `input` are buffered
 internally and emitted after the next call to `textDecoder.decode()`.
 
 If `textDecoder.fatal` is `true`, decoding errors that occur will result in a