Try bumping mignw-w64 to 12.1

Author: mati865

.github/workflows/ci.yml

@@ -558,9 +558,12 @@ jobs:
     strategy:
       matrix:
         include:
-          - name: dist-x86_64-linux
-            os: ubuntu-20.04-xl
-            env: {}
+          - name: i686-mingw-1
+            env:
+              RUST_CONFIGURE_ARGS: "--build=i686-pc-windows-gnu"
+              SCRIPT: make ci-mingw-subset-1
+              CUSTOM_MINGW: 1
+            os: windows-latest-xl
     timeout-minutes: 600
     runs-on: "${{ matrix.os }}"
     steps:

src/ci/github-actions/ci.yml

@@ -691,9 +691,12 @@ jobs:
     strategy:
       matrix:
         include:
-          - &dist-x86_64-linux
-            name: dist-x86_64-linux
-            <<: *job-linux-xl
+          - name: i686-mingw-1
+            env:
+              RUST_CONFIGURE_ARGS: --build=i686-pc-windows-gnu
+              SCRIPT: make ci-mingw-subset-1
+              CUSTOM_MINGW: 1
+            <<: *job-windows-xl
 
   master:
     name: master

src/ci/scripts/install-mingw.sh

@@ -64,7 +64,7 @@ if isWindows; then
     else
         mingw_dir="mingw${bits}"
 
-        curl -o mingw.7z "${MIRRORS_BASE}/${mingw_archive}"
+        curl -o mingw.7z "https://github.com/niXman/mingw-builds-binaries/releases/download/12.1.0-rt_v10-rev3/i686-12.1.0-release-posix-dwarf-rt_v10-rev3.7z"
         7z x -y mingw.7z > /dev/null
         curl -o "${mingw_dir}/bin/gdborig.exe" "${MIRRORS_BASE}/2017-04-20-${bits}bit-gdborig.exe"
         ciCommandAddPath "$(pwd)/${mingw_dir}/bin"