build: Use gcc 15.2.0posix-13.0.0-msvcrt-r4 for windows build

Author: g-bougard

Changes

@@ -77,7 +77,7 @@ toolbox:
 packaging:
 * Update Windows packaging to use:
   - Perl 5.42.0 built using Perl::Dist::StrawBerry perl library processing
-  - gcc 15.2.0posix-13.0.0-msvcrt-r3
+  - gcc 15.2.0posix-13.0.0-msvcrt-r4
   - OpenSSL 3.5.4
   - liblzma from xz 5.8.1
   - libxml2 2.15.1

contrib/windows/packaging/ToolchainBuildJob.pm

@@ -6,8 +6,8 @@ use parent 'Exporter';
 use constant {
     # Toolchain setup
     TOOLCHAIN_BASE_URL  => 'https://github.com/brechtsanders/winlibs_mingw/releases/download',
-    TOOLCHAIN_VERSION   => '15.2.0posix-13.0.0-msvcrt-r3',
-    TOOLCHAIN_ARCHIVE   => 'winlibs-x86_64-posix-seh-gcc-15.2.0-mingw-w64msvcrt-13.0.0-r3.zip'
+    TOOLCHAIN_VERSION   => '15.2.0posix-13.0.0-msvcrt-r4',
+    TOOLCHAIN_ARCHIVE   => 'winlibs-x86_64-posix-seh-gcc-15.2.0-mingw-w64msvcrt-13.0.0-r4.zip'
 };
 
 sub toolchain_build_steps {