chore(deps): add TUnit Mocks packages group to renovate configuration

Author: samtrion

renovate.json

@@ -66,7 +66,14 @@
       "groupName": "TUnit packages",
       "groupSlug": "tunit-packages",
       "matchManagers": ["nuget"],
-      "matchPackageNames": ["TUnit", "TUnit.*", "Verify.TUnit"]
+      "matchPackageNames": ["TUnit", "TUnit.*", "Verify.TUnit", "!TUnit.Mocks", "!TUnit.Mocks.*"]
+    },
+    {
+      "groupName": "TUnit Mocks packages",
+      "groupSlug": "tunit-mocks-packages",
+      "matchManagers": ["nuget"],
+      "matchPackageNames": ["TUnit.Mocks", "TUnit.Mocks.*"],
+      "ignoreUnstable": false
     },
     {
       "groupName": "XUnit.V3 packages",