Pin the aarch64 Miniforge installer to unbreak Linux aarch64 wheel builds

The aarch64 bootstrap downloaded Miniforge from the releases/latest pointer.
That pointer moved to 26.5.3, whose base env is on Python 3.14, and the shared
setup-binary-builds action then fails installing conda=25.3.0, which has no
Python 3.14 build. Pin the installer to the release that was last green.

Author: shoumikhin

.github/workflows/build_wheels_linux.yml

@@ -201,7 +201,12 @@ jobs:
           # when using Python version, less than the conda latest
           ###############################################################################
           echo 'Installing conda-forge'
-          curl -L -o /mambaforge.sh https://github.com/conda-forge/miniforge/releases/latest/download/Miniforge3-Linux-aarch64.sh
+          # Pin the installer. The shared setup-binary-builds action installs
+          # conda=25.3.0 into this base env, and conda 25.3.0 has no Python 3.14
+          # build. Miniforge releases newer than this one put the base env on
+          # Python 3.14, which makes that install unsatisfiable and fails every
+          # aarch64 wheel build. Bump this tag only together with that pin.
+          curl -fL -o /mambaforge.sh https://github.com/conda-forge/miniforge/releases/download/26.3.2-3/Miniforge3-Linux-aarch64.sh
           chmod +x /mambaforge.sh
           /mambaforge.sh -b -p /opt/conda
           rm /mambaforge.sh