nginxMainline: 1.29.2 -> 1.29.3

Changes:
```
Changes with nginx 1.29.3                                        28 Oct 2025

    *) Feature: the "add_header_inherit" and "add_trailer_inherit"
       directives.

    *) Feature: the $request_port and $is_request_port variables.

    *) Feature: the $ssl_sigalg and $ssl_client_sigalg variables.

    *) Feature: the "volatile" parameter of the "geo" directive.

    *) Feature: now certificate compression is available with BoringSSL.

    *) Bugfix: now certificate compression is disabled with OCSP stapling.
```

pkgs/servers/http/nginx/mainline.nix

@@ -1,6 +1,6 @@
 { callPackage, ... }@args:
 
 callPackage ./generic.nix args {
-  version = "1.29.2";
-  hash = "sha256-Vmnjwp1Jv39utXcnW4bv5FBM+Br4hcWKHtfS57hJJDc=";
+  version = "1.29.3";
+  hash = "sha256-m+/M7RLuCcL04Thdfo4hyR8aWmOxlvePiXwtBEuMkxI=";
 }