upgraded to .net 9

Author: HaikAsatryan

.github/workflows/main.yml

@@ -16,10 +16,10 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Setup .NET Core
-        uses: actions/setup-dotnet@v3
+        uses: actions/setup-dotnet@v4
         with:
           global-json-file: global.json
 

global.json

@@ -1,6 +1,6 @@
 {
   "sdk": {
-    "version": "8.0.200",
-    "rollForward": "latestMajor"
+    "version": "9.0.100",
+    "rollForward": "latestMinor"
   }
 }