Update dependency dotnet-ef to v8.0.8

.config/dotnet-tools.json

@@ -3,7 +3,7 @@
   "isRoot": true,
   "tools": {
     "dotnet-ef": {
-      "version": "8.0.7",
+      "version": "8.0.8",
       "commands": [
         "dotnet-ef"
       ]