ci: fix failing py3.13 on osx-64 (#258)

* ci: fix failing py3.13 on osx-64

* use miniforge

* better news

---------

Co-authored-by: Simon Billinge <sbillinge@users.noreply.github.com>

Author: Tieqiong

.github/workflows/matrix-and-codecov-on-merge-to-main.yml

@@ -32,7 +32,7 @@ jobs:
         uses: conda-incubator/setup-miniconda@v3
         with:
           activate-environment: test
-          auto-update-conda: true
+          miniforge-version: latest
           environment-file: environment.yml
           auto-activate-base: false
           python-version: ${{ matrix.python-version }}

news/osx13.rst

@@ -0,0 +1,23 @@
+**Added:**
+
+* <news item>
+
+**Changed:**
+
+* <news item>
+
+**Deprecated:**
+
+* <news item>
+
+**Removed:**
+
+* <news item>
+
+**Fixed:**
+
+* Use miniforge in CI to avoid strange error of incorrect MacOS version logged from base     env
+
+**Security:**
+
+* <news item>