Bump libwebv0.4.1

The following commit fixes a memory leak caused by untrusted user input:

commit 953210bd1930e1734f1acde86eadd7a1997bb7c3
Author: Xavier Del Campo Romero
Date:   Sun Oct 26 20:12:46 2025 +0100

    form.c: Fix leak on invalid form

    When one or more entries have been appended to a struct form instance,
    but then an error occurs, those valid entries must be deallocated, too.

1 files changed, 0 insertions, 0 deletions

diff --git a/libweb b/libweb
-Subproject de7f4b2ffcd92dfeada9235ce857b801a4851da
+Subproject 953210bd1930e1734f1acde86eadd7a1997bb7c