chore: update submodule URL

Author: 3w36zj6

.gitmodules

@@ -1,3 +1,3 @@
 [submodule "website/typst-docs-web"]
 	path = website/typst-docs-web
-	url = ../typst-docs-web.git
+	url = ../../typst-community/typst-docs-web.git