Fix various typos

Follow-up typos found via `codespell -q 3 -S ./thirdparty,*.po,./DONORS.md -L ackward,ang,ans,ba,beng,cas,childs,childrens,dof,doubleclick,fave,findn,hist,inout,leapyear,lod,nd,numer,ois,ony,paket,seeked,sinc,switchs,te,uint`

editor/editor_node.cpp

@@ -1555,7 +1555,7 @@ int EditorNode::_save_external_resources() {
 		if (!res->get_path().is_resource_file()) {
 			continue;
 		}
-		//not only check if this resourec is edited, check contained subresources too
+		//not only check if this resource is edited, check contained subresources too
 		if (_find_edited_resources(res, edited_subresources)) {
 			ResourceSaver::save(res->get_path(), res, flg);
 			saved++;