chore: use swift v6 for example app

Author: russellwheatley

samples/swiftui/FirebaseSwiftUIExample/FirebaseSwiftUIExample.xcodeproj/project.pbxproj

@@ -481,7 +481,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = io.flutter.plugins.firebase.auth.example;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_EMIT_LOC_STRINGS = YES;
-				SWIFT_VERSION = 5.0;
+				SWIFT_VERSION = 6.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 			};
 			name = Debug;
@@ -514,7 +514,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = io.flutter.plugins.firebase.auth.example;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_EMIT_LOC_STRINGS = YES;
-				SWIFT_VERSION = 5.0;
+				SWIFT_VERSION = 6.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 			};
 			name = Release;
@@ -532,7 +532,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = io.invertase.testing.FirebaseSwiftUIExampleTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_EMIT_LOC_STRINGS = NO;
-				SWIFT_VERSION = 5.0;
+				SWIFT_VERSION = 6.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/FirebaseSwiftUIExample.app/$(BUNDLE_EXECUTABLE_FOLDER_PATH)/FirebaseSwiftUIExample";
 			};
@@ -551,7 +551,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = io.invertase.testing.FirebaseSwiftUIExampleTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_EMIT_LOC_STRINGS = NO;
-				SWIFT_VERSION = 5.0;
+				SWIFT_VERSION = 6.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/FirebaseSwiftUIExample.app/$(BUNDLE_EXECUTABLE_FOLDER_PATH)/FirebaseSwiftUIExample";
 			};
@@ -568,7 +568,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = io.invertase.testing.FirebaseSwiftUIExampleUITests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_EMIT_LOC_STRINGS = NO;
-				SWIFT_VERSION = 5.0;
+				SWIFT_VERSION = 6.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				TEST_TARGET_NAME = FirebaseSwiftUIExample;
 			};
@@ -585,7 +585,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = io.invertase.testing.FirebaseSwiftUIExampleUITests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_EMIT_LOC_STRINGS = NO;
-				SWIFT_VERSION = 5.0;
+				SWIFT_VERSION = 6.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				TEST_TARGET_NAME = FirebaseSwiftUIExample;
 			};