macOS: update version for hotfix rebuild

platform/xcode/love.xcodeproj/project.pbxproj

@@ -464,7 +464,7 @@
 					"$(inherited)",
 					"@executable_path/../Frameworks",
 				);
-				MARKETING_VERSION = 11.5;
+				MARKETING_VERSION = 11.5a;
 				PRODUCT_BUNDLE_IDENTIFIER = org.love2d.love;
 				PRODUCT_NAME = love;
 			};
@@ -496,7 +496,7 @@
 					"$(inherited)",
 					"@executable_path/../Frameworks",
 				);
-				MARKETING_VERSION = 11.5;
+				MARKETING_VERSION = 11.5a;
 				PRODUCT_BUNDLE_IDENTIFIER = org.love2d.love;
 				PRODUCT_NAME = love;
 			};
@@ -912,7 +912,7 @@
 					"$(inherited)",
 					"@executable_path/../Frameworks",
 				);
-				MARKETING_VERSION = 11.5;
+				MARKETING_VERSION = 11.5a;
 				PRODUCT_BUNDLE_IDENTIFIER = org.love2d.love;
 				PRODUCT_NAME = love;
 			};