Added missed limiters for Visual Shader node enums

doc/classes/VisualShaderNodeFloatUniform.xml

@@ -40,5 +40,8 @@
 		<constant name="HINT_RANGE_STEP" value="2" enum="Hint">
 			A range hint for scalar value with step, which limits possible input values between [member min] and [member max], with a step (increment) of [member step]). Translated to [code]hint_range(min, max, step)[/code] in shader code.
 		</constant>
+		<constant name="HINT_MAX" value="3" enum="Hint">
+			Represents the size of the [enum Hint] enum.
+		</constant>
 	</constants>
 </class>