bump glibc TargetLibraryVersion to 2.23 in accordance with .NET 8 policy

Author: alexrp

src/sdk/build/Vezel.Zig.Sdk.Cross.Target.targets

@@ -76,10 +76,8 @@
     </PropertyGroup>
 
     <PropertyGroup Condition="'$(TargetLibrary)' == 'glibc'">
-        <TargetLibraryVersion>2.17</TargetLibraryVersion>
+        <TargetLibraryVersion>2.23</TargetLibraryVersion>
         <TargetLibraryVersion Condition="'$(TargetArchitecture)' == 'loongarch64'">2.36</TargetLibraryVersion>
-        <TargetLibraryVersion Condition="'$(TargetArchitecture)' == 'powerpc64le'">2.19</TargetLibraryVersion>
-        <TargetLibraryVersion Condition="'$(TargetArchitecture)' == 'riscv64'">2.27</TargetLibraryVersion>
     </PropertyGroup>
 
     <PropertyGroup>