[net8.0-xcode15] Bump default target platform version to Xcode 15's OS versions. (#18815)

Our .NET 8 release will launch with Xcode 15 support, so bump the
default target platform version to the corresponding Xcode 15 OS versions.

Author: rolfbjarne

Make.versions

@@ -79,11 +79,11 @@ MACCATALYST_NUGET_OS_VERSION=17.0
 # Basically: this should be the last OS version of the platform in question when the current major .NET version is first released to stable.
 # Ref: https://github.com/dotnet/designs/blob/8e6394406d44f75f30ea2259a425cb9e38d75b69/accepted/2020/net5/net5.md#os-versions
 
-DEFAULT_TARGET_PLATFORM_VERSION_IOS=16.1
-DEFAULT_TARGET_PLATFORM_VERSION_TVOS=16.1
-DEFAULT_TARGET_PLATFORM_VERSION_WATCHOS=9.1
-DEFAULT_TARGET_PLATFORM_VERSION_MACOS=13.0
-DEFAULT_TARGET_PLATFORM_VERSION_MACCATALYST=16.1
+DEFAULT_TARGET_PLATFORM_VERSION_IOS=17.0
+DEFAULT_TARGET_PLATFORM_VERSION_TVOS=17.0
+DEFAULT_TARGET_PLATFORM_VERSION_WATCHOS=10.0
+DEFAULT_TARGET_PLATFORM_VERSION_MACOS=14.0
+DEFAULT_TARGET_PLATFORM_VERSION_MACCATALYST=17.0
 
 # .NET 7 versions are bumped using maestro.
 

tools/common/SdkVersions.cs

@@ -49,10 +49,10 @@ static class SdkVersions {
 		public const string MaxWatchDeploymentTarget = "10.0";
 		public const string MaxTVOSDeploymentTarget = "17.0";
 
-		public const string DefaultTargetPlatformVersioniOS = "16.1";
-		public const string DefaultTargetPlatformVersiontvOS = "16.1";
-		public const string DefaultTargetPlatformVersionmacOS = "13.0";
-		public const string DefaultTargetPlatformVersionMacCatalyst = "16.1";
+		public const string DefaultTargetPlatformVersioniOS = "17.0";
+		public const string DefaultTargetPlatformVersiontvOS = "17.0";
+		public const string DefaultTargetPlatformVersionmacOS = "14.0";
+		public const string DefaultTargetPlatformVersionMacCatalyst = "17.0";
 
 		public static Version OSXVersion { get { return new Version (OSX); } }
 		public static Version iOSVersion { get { return new Version (iOS); } }