Documentation: Fix typo in NewGRF additions (NML) document

docs/newgrf-additions-nml.html

@@ -644,7 +644,7 @@ item (FEAT_GLOBALVARS) {
 		<td>
 			Set the look-ahead to single signal only mode for the most recently defined style (defined using the <span class="code">define_style</span> property).<br />
 			This property only makes a difference when the "realistic train braking is aspect limited" game setting is enabled, or when using a different signal
-			type which uses <span class="code">tyle_combined_normal_shunt</span>.<br />
+			type which uses <span class="code">style_combined_normal_shunt</span>.<br />
 			This is similar to <span class="code">style_lookahead_extra_aspects</span> with a value of 0, except the lookahead always ends at the
 			next signal, even if that signal type sets <span class="code">style_no_aspect_increase</span>.<br />
 			If enabled, this property overrides <span class="code">style_lookahead_extra_aspects</span>.<br />