xcode: address setting recommendations added in 13.1

platform/xcode/liblove.xcodeproj/project.pbxproj

@@ -4141,7 +4141,7 @@
 		08FB7793FE84155DC02AAC07 /* Project object */ = {
 			isa = PBXProject;
 			attributes = {
-				LastUpgradeCheck = 1250;
+				LastUpgradeCheck = 1310;
 				TargetAttributes = {
 					FA0B78DC1A958B90000E1D17 = {
 						CreatedOnToolsVersion = 6.1.1;

platform/xcode/love.xcodeproj/project.pbxproj

@@ -328,7 +328,7 @@
 		29B97313FDCFA39411CA2CEA /* Project object */ = {
 			isa = PBXProject;
 			attributes = {
-				LastUpgradeCheck = 1250;
+				LastUpgradeCheck = 1310;
 				TargetAttributes = {
 					FA0B7F051A95AAF3000E1D17 = {
 						CreatedOnToolsVersion = 6.1.1;