fix: Correct vcpkg URL.

Author: vtraag

vcpkg.json

@@ -3,7 +3,7 @@
   "version": "$Format:%(describe)$",
   "maintainers": "V.A. Traag <v.a.traag@cwts.leidenuniv.nl>",
   "description": "Leiden is a general algorithm for methods of community detection in large networks.",
-  "homepage": "https://github.com/vtraag/leidenalg",
+  "homepage": "https://github.com/vtraag/libleidenalg",
   "license": "GPL-3.0-or-later",
   "builtin-baseline": "253704407ae68efa37bf8f5b59b3e06dd40d3d3f",
   "dependencies": [