Update global.json to .NET SDK 5.0.300

GlebChili · GlebChili · commit 2829bd38be61 · 2021-05-28T16:17:48.000+03:00
diff --git a/global.json b/global.json
@@ -1,6 +1,6 @@
 {
   "sdk": {
-    "version": "5.0.202",
+    "version": "5.0.300",
     "allowPrerelease": false
   }
 }
