chore(deps): bump @fluentui/merge-styles from 8.5.15 to 8.6.13 (#3299)

Bumps [@fluentui/merge-styles](https://github.com/microsoft/fluentui) from 8.5.15 to 8.6.13.
- [Release notes](https://github.com/microsoft/fluentui/releases)
- [Changelog](https://github.com/microsoft/fluentui/blob/master/azure-pipelines.release-fluentui.yml)
- [Commits](https://github.com/microsoft/fluentui/compare/@fluentui/merge-styles_v8.5.15...@fluentui/merge-styles_v8.6.13)

---
updated-dependencies:
- dependency-name: "@fluentui/merge-styles"
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

yarn.lock

@@ -2734,17 +2734,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@fluentui/merge-styles@npm:^8.5.15":
-  version: 8.5.15
-  resolution: "@fluentui/merge-styles@npm:8.5.15"
-  dependencies:
-    "@fluentui/set-version": "npm:^8.2.14"
-    tslib: "npm:^2.1.0"
-  checksum: 10/6dc345dd85b982c5e14bec90cb8552e8a584c25f57787192011d756c00819340e77f7cd2ade15ece573b6b54892050f8636f8166cec5408bfc7f683c822b5ef8
-  languageName: node
-  linkType: hard
-
-"@fluentui/merge-styles@npm:^8.6.13":
+"@fluentui/merge-styles@npm:^8.5.15, @fluentui/merge-styles@npm:^8.6.13":
   version: 8.6.13
   resolution: "@fluentui/merge-styles@npm:8.6.13"
   dependencies: