add vcpkg installed dir to gitignore (#2258)

Author: henderkes

.gitignore

@@ -1,14 +1,15 @@
+/caddy/frankenphp/Build
 /caddy/frankenphp/frankenphp
-/internal/testserver/testserver
-/internal/testcli/testcli
 /dist
 /github_conf
+/internal/testserver/testserver
+/internal/testcli/testcli
+/package/etc/php.ini
 /super-linter-output
+/vcpkg_installed/
 .DS_Store
 .idea/
 .vscode/
 __debug_bin
 frankenphp.test
-caddy/frankenphp/Build
-package/etc/php.ini
 *.log