build(deps): bump github.com/microsoft/vcpkg from master to 2026.03.18

Bumps [github.com/microsoft/vcpkg](https://github.com/microsoft/vcpkg) from master to 2026.03.18. This release includes the previously tagged commit.
- [Release notes](https://github.com/microsoft/vcpkg/releases)
- [Commits](microsoft/vcpkg@62159a4...c3867e7)

---
updated-dependencies:
- dependency-name: github.com/microsoft/vcpkg
  dependency-version: 2026.03.18
  dependency-type: direct:production
...

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

Author: dependabot[bot]

vcpkg.json

@@ -2,7 +2,7 @@
   "$schema": "https://raw.githubusercontent.com/microsoft/vcpkg-tool/main/docs/vcpkg.schema.json",
   "name": "dsd-neo",
   "version-string": "0.1.0",
-  "builtin-baseline": "62159a45e18f3a9ac0548628dcaf74fcb60c6ff9",
+  "builtin-baseline": "c3867e714dd3a51c272826eea77267876517ed99",
   "description": "Digital Speech Decoder: DSD-neo",
   "homepage": "https://github.com/arancormonk/dsd-neo",
   "dependencies": [