Upgrade to net9 (#18)

Co-authored-by: Smaug123 <3138005+Smaug123@users.noreply.github.com>
Reviewed-on: #18

flake.nix

@@ -17,8 +17,8 @@
       projectFile = "./PureGym.App/PureGym.App.fsproj";
       testProjectFile = "./PureGym.Test/PureGym.Test.fsproj";
       pname = "puregym";
-      dotnet-sdk = pkgs.dotnet-sdk_8;
-      dotnet-runtime = pkgs.dotnetCorePackages.runtime_8_0;
+      dotnet-sdk = pkgs.dotnetCorePackages.sdk_9_0;
+      dotnet-runtime = pkgs.dotnetCorePackages.runtime_9_0;
       version = "0.1";
       dotnetTool = toolName: toolVersion: hash:
         pkgs.stdenvNoCC.mkDerivation rec {
@@ -29,7 +29,7 @@
             pname = name;
             version = version;
             hash = hash;
-            installPhase = ''mkdir -p $out/bin && cp -r tools/net6.0/any/* $out/bin'';
+            installPhase = ''mkdir -p $out/bin && cp -r tools/*/any/* $out/bin'';
           };
           installPhase = ''
             runHook preInstall
@@ -59,7 +59,7 @@
       };
       devShells.default = pkgs.mkShell {
         buildInputs =
-          [pkgs.alejandra pkgs.dotnet-sdk_8 pkgs.python3 pkgs.nodePackages.markdown-link-check]
+          [pkgs.alejandra dotnet-sdk pkgs.python3 pkgs.nodePackages.markdown-link-check]
           ++ (
             if pkgs.stdenv.isDarwin
             then [pkgs.darwin.apple_sdk.frameworks.CoreServices]