Bump github.com/microsoft/vcpkg from master to 2026.05.25

Bumps [github.com/microsoft/vcpkg](https://github.com/microsoft/vcpkg) from master to 2026.05.25. This release includes the previously tagged commit.
- [Release notes](https://github.com/microsoft/vcpkg/releases)
- [Commits](microsoft/vcpkg@56bb241...d015e31)

---
updated-dependencies:
- dependency-name: github.com/microsoft/vcpkg
  dependency-version: 2026.05.25
  dependency-type: direct:production
...

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

Author: dependabot[bot]

vcpkg.json

@@ -7,5 +7,5 @@
     "openssl",
     "zlib"
   ],
-  "builtin-baseline": "56bb2411609227288b70117ead2c47585ba07713"
+  "builtin-baseline": "d015e31e90838a4c9dfa3eed45979bc70d9357fc"
 }