Auto merge of #149589 - mati865:mingw-experiments, r=<try>

bump windows-gnu C toolchain

try-job: dist-i686-mingw
try-job: dist-x86_64-mingw
try-job: dist-x86_64-linux

Author: rust-bors[bot]

src/ci/scripts/install-mingw.sh

@@ -6,8 +6,9 @@ IFS=$'\n\t'
 
 source "$(cd "$(dirname "$0")" && pwd)/../shared.sh"
 
-MINGW_ARCHIVE_32="i686-14.1.0-release-posix-dwarf-msvcrt-rt_v12-rev0.7z"
-MINGW_ARCHIVE_64="x86_64-14.1.0-release-posix-seh-msvcrt-rt_v12-rev0.7z"
+MINGW_ARCHIVE_32="i686-14.2.0-release-posix-dwarf-msvcrt-rt_v12-rev2.7z"
+MINGW_ARCHIVE_64="x86_64-14.2.0-release-posix-seh-msvcrt-rt_v12-rev2.7z"
+TMP_URL="https://github.com/niXman/mingw-builds-binaries/releases/download/14.2.0-rt_v12-rev2/"
 LLVM_MINGW_ARCHIVE_AARCH64="llvm-mingw-20251104-ucrt-aarch64.zip"
 LLVM_MINGW_ARCHIVE_X86_64="llvm-mingw-20251104-ucrt-x86_64.zip"
 
@@ -49,7 +50,7 @@ if isWindows && isKnownToBeMingwBuild; then
 
     case "${mingw_archive}" in
         *.7z)
-            curl -o mingw.7z "${MIRRORS_BASE}/${mingw_archive}"
+            curl -Lo mingw.7z "${TMP_URL}/${mingw_archive}"
             7z x -y mingw.7z > /dev/null
             ;;
         *.zip)