Fix typos with codespell

Using codespell 1.15.0.

Method:
```
$ cat > ../godot-word-whitelist.txt << EOF
ang
curvelinear
doubleclick
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
```

editor/doc/doc_dump.cpp

@@ -111,7 +111,7 @@ void DocDump::dump(const String &p_file) {
 
 		for (List<MethodInfo>::Element *E = method_list.front(); E; E = E->next()) {
 			if (E->get().name == "" || E->get().name[0] == '_')
-				continue; //hiden
+				continue; //hidden
 
 			MethodBind *m = ClassDB::get_method(name, E->get().name);