chore: renovate to ignorepaths with dotnet files (#202)

~The `sdk` folder is completely auto-generated so we don't want
`renovate` updating anything there.~
I came across this while checking #196 #197 which I don't understand
because "sdk/**" was already specified

renovate.json

@@ -3,9 +3,15 @@
   "extends": [
     "config:base"
   ],
+  "ignorePresets": [":ignoreModulesAndTests"],
   "ignorePaths": [
     "sdk/**",
     "!sdk/go.mod",
     "!sdk/go.sum"
-  ]
+  ],
+  "nuget": {
+    "ignorePaths": [
+      "sdk/dotnet/**"
+    ]
+  }
 }