Bump njs to v0.9.1

[macbre]

Changes with njs 0.9.1                                       10 Jul 2025

    nginx modules:
    *) Feature: added Fetch API for QuickJS engine.
    *) Feature: added state file for a shared dictionary.
    *) Bugfix: fixed handling of Content-Length header when
       a body is provided for Fetch API.
    *) Bugfix: fixed qjs engine after bellard/quickjs@458c34d2.
    *) Bugfix: fixed NULL pointer dereference when processing
       If-* headers.

    Core:
    *) Feature: added ECDH support for WebCrypto.
    *) Improvement: reduced memory consumption by the object hash.
       The new hash uses 42% less memory per element.
    *) Improvement: reduced memory consumption for concatenation of
       numbers and strings.
    *) Improvement: reduced memory consumption of
       String.prototype.concat() with scalar values.
    *) Bugfix: fixed segfault in njs_property_query().
       The issue was introduced in b28e50b1 (0.9.0).
    *) Bugfix: fixed Function constructor template injection.
    *) Bugfix: fixed GCC compilation with O3 optimization level.
    *) Bugfix: fixed constant is too large for 'long' warning
       on MIPS -mabi=n32.
    *) Bugfix: fixed compilation with GCC 4.1.
    *) Bugfix: fixed %TypedArray%.from() with the buffer is detached
       by the mapper.
    *) Bugfix: fixed %TypedArray%.prototype.slice() with overlapping
       buffers.
    *) Bugfix: fixed handling of detached buffers for typed arrays.
    *) Bugfix: fixed frame saving for async functions with
       closures.
    *) Bugfix: fixed RegExp compilation of patterns with
       escaped '[' characters.