Fix typos with codespell

Using codespell 2.0.0.

Method:
```
$ cat > ../godot-word-whitelist.txt << EOF
ang
curvelinear
dof
doubleclick
fave
findn
GIRD
leapyear
lod
merchantibility
nd
numer
ois
ony
que
seeked
synching
te
uint
unselect
webp
EOF

$ codespell -w -q 3 -I ../godot-word-whitelist.txt --skip="./thirdparty,*.po"
$ git diff // undo unwanted changes
```

platform/javascript/js/libs/library_godot_audio.js

@@ -59,7 +59,7 @@ const GodotAudio = {
 				}
 				onstatechange(state);
 			};
-			ctx.onstatechange(); // Immeditately notify state.
+			ctx.onstatechange(); // Immediately notify state.
 			// Update computed latency
 			GodotAudio.interval = setInterval(function () {
 				let computed_latency = 0;