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
```

modules/enet/networked_multiplayer_enet.cpp

@@ -231,7 +231,7 @@ void NetworkedMultiplayerENet::poll() {
 					break;
 				}
 
-				// A client joined with an invalid ID (neagtive values, 0, and 1 are reserved).
+				// A client joined with an invalid ID (negative values, 0, and 1 are reserved).
 				// Probably trying to exploit us.
 				if (server && ((int)event.data < 2 || peer_map.has((int)event.data))) {
 					enet_peer_reset(event.peer);