Bump github.com/microsoft/vcpkg from master to 2025.12.12

Bumps [github.com/microsoft/vcpkg](https://github.com/microsoft/vcpkg) from master to 2025.12.12. This release includes the previously tagged commit.
- [Release notes](https://github.com/microsoft/vcpkg/releases)
- [Commits](microsoft/vcpkg@74e6536...84bab45)

---
updated-dependencies:
- dependency-name: github.com/microsoft/vcpkg
  dependency-version: 2025.12.12
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

vcpkg.json

@@ -7,5 +7,5 @@
     "openssl",
     "zlib"
   ],
-  "builtin-baseline": "74e6536215718009aae747d86d84b78376bf9e09"
+  "builtin-baseline": "84bab45d415d22042bd0b9081aea57f362da3f35"
 }