chore(deps): update https://github.com/microsoft/vcpkg digest to 7721704

Author: msclock-bot[bot]

vcpkg.json

@@ -2,7 +2,7 @@
   "$schema": "https://raw.githubusercontent.com/microsoft/vcpkg-tool/main/docs/vcpkg.schema.json",
   "name": "cppfront-practice",
   "description": "Practice based on cppfront",
-  "builtin-baseline": "984f9232b2fe0eb94f5e9f161d6c632c581fff0c",
+  "builtin-baseline": "772170438c9a2fd90198d71c7c66b52c675ae844",
   "homepage": "https://github.com/msclock/cppfront-practice",
   "dependencies": [
     "cppfront",