build(deps): Bump gitversion.tool from 5.12.0 to 6.0.3 (Azure#3122)

Bumps [gitversion.tool](https://github.com/GitTools/GitVersion) from 5.12.0 to 6.0.3.
- [Release notes](https://github.com/GitTools/GitVersion/releases)
- [Changelog](https://github.com/GitTools/GitVersion/blob/main/BREAKING_CHANGES.md)
- [Commits](GitTools/GitVersion@5.12.0...6.0.3)

---
updated-dependencies:
- dependency-name: gitversion.tool
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.config/dotnet-tools.json

@@ -3,11 +3,11 @@
   "isRoot": true,
   "tools": {
     "gitversion.tool": {
-      "version": "5.12.0",
+      "version": "6.0.3",
       "commands": [
         "dotnet-gitversion"
       ],
       "rollForward": false
     }
   }
-}
+}