Rename RD::free binding to free_rid

doc/classes/RenderingDevice.xml

@@ -305,7 +305,7 @@
 			<description>
 			</description>
 		</method>
-		<method name="free">
+		<method name="free_rid">
 			<return type="void" />
 			<argument index="0" name="rid" type="RID" />
 			<description>

servers/rendering/rendering_device.cpp

@@ -447,7 +447,7 @@ void RenderingDevice::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("compute_list_add_barrier", "compute_list"), &RenderingDevice::compute_list_add_barrier);
 	ClassDB::bind_method(D_METHOD("compute_list_end", "post_barrier"), &RenderingDevice::compute_list_end, DEFVAL(BARRIER_MASK_ALL));
 
-	ClassDB::bind_method(D_METHOD("free", "rid"), &RenderingDevice::free);
+	ClassDB::bind_method(D_METHOD("free_rid", "rid"), &RenderingDevice::free);
 
 	ClassDB::bind_method(D_METHOD("capture_timestamp", "name"), &RenderingDevice::capture_timestamp);
 	ClassDB::bind_method(D_METHOD("get_captured_timestamps_count"), &RenderingDevice::get_captured_timestamps_count);