Bump github.com/mattermost/mattermost-server/v6 from 6.6.1 to 6.7.0 in /dependabot (#150)

Bumps [github.com/mattermost/mattermost-server/v6](https://github.com/mattermost/mattermost-server) from 6.6.1 to 6.7.0.
- [Release notes](https://github.com/mattermost/mattermost-server/releases)
- [Changelog](https://github.com/mattermost/mattermost-server/blob/master/CHANGELOG.md)
- [Commits](https://github.com/mattermost/mattermost-server/compare/v6.6.1...v6.7.0)

---
updated-dependencies:
- dependency-name: github.com/mattermost/mattermost-server/v6
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

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

dependabot/go.mod

@@ -3,6 +3,7 @@ module github.com/SmartHoneybee/ubiquitous-memory/dependabot
 go 1.16
 
 require (
-	github.com/mattermost/mattermost-server/v6 v6.6.1
+	github.com/mattermost/mattermost-server/v6 v6.7.0
 	github.com/mattermost/mmctl v0.0.0-20211221153052-1bb2fec4c15e
+	github.com/spf13/viper v1.10.0 // indirect
 )