Bump defu from 6.1.4 to 6.1.6

Bumps [defu](https://github.com/unjs/defu) from 6.1.4 to 6.1.6.
- [Release notes](https://github.com/unjs/defu/releases)
- [Changelog](https://github.com/unjs/defu/blob/main/CHANGELOG.md)
- [Commits](unjs/defu@v6.1.4...v6.1.6)

---
updated-dependencies:
- dependency-name: defu
  dependency-version: 6.1.6
  dependency-type: indirect
...

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

Author: dependabot[bot]

.yarn/cache/defu-npm-6.1.4-c791c7f2cc-aeffdb4730.zip

@@ -4689,9 +4689,9 @@ __metadata:
   linkType: hard
 
 "defu@npm:^6.1.4":
-  version: 6.1.4
-  resolution: "defu@npm:6.1.4"
-  checksum: 10/aeffdb47300f45b4fdef1c5bd3880ac18ea7a1fd5b8a8faf8df29350ff03bf16dd34f9800205cab513d476e4c0a3783aa0cff0a433aff0ac84a67ddc4c8a2d64
+  version: 6.1.6
+  resolution: "defu@npm:6.1.6"
+  checksum: 10/8fc81f8e4484a008d13fceeb79261677c9b887ea6a0c6841b8a87802366d7b4ce63317ba87f08a59f9448b78cf9bbaecf0e0f840a091bbb2edf9a9adff108343
   languageName: node
   linkType: hard