chore(deps): update https://github.com/microsoft/vcpkg digest to 7e21420

Author: serious-scaffold[bot]

template/vcpkg.json.jinja

@@ -2,7 +2,7 @@
   "$schema": "https://raw.githubusercontent.com/microsoft/vcpkg-tool/main/docs/vcpkg.schema.json",
   "name": "{{ ss_cmake_repo_name }}",
   "description": "{{ ss_cmake_project_description }}",
-  "builtin-baseline": "f9701294aebc79cfe1c409c34a1fe4f37fee3473",
+  "builtin-baseline": "7e21420f775f72ae938bdeb5e6068f722088f06a",
   "homepage": "https://{{ ss_cmake_repo_url }}",
   "dependencies": [
 [%- if ss_cmake_use_conan == true %]