chore(deps): update dependency gitversion.tool to v6.8.1 (#130)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.config/dotnet-tools.json

@@ -3,7 +3,7 @@
   "isRoot": true,
   "tools": {
     "gitversion.tool": {
-      "version": "6.7.0",
+      "version": "6.8.1",
       "commands": ["dotnet-gitversion"],
       "rollForward": false
     }