Migrate to mamba-org/setup-micromamba (#1758)

* setup-micromamba migration

Committer: Devon Watt <devon.watt@mail.mcgill.ca>

 On branch micromamba
 Changes to be committed:
	modified:   .github/workflows/pytest.yml

* double check vs ex

* update release docs

* tidy up, rerun build

* Update docs/sphinx/source/whatsnew/v0.9.6.rst

---------

Co-authored-by: Kevin Anderson <kevin.anderso@gmail.com>

.github/workflows/pytest.yml

@@ -40,13 +40,14 @@ jobs:
 
       - name: Install Conda environment with Micromamba
         if: matrix.environment-type == 'conda'
-        uses: mamba-org/provision-with-micromamba@v14
+        uses: mamba-org/setup-micromamba@v1
         with:
           environment-file: ${{ env.REQUIREMENTS }}
           cache-downloads: true
-          extra-specs: |
+          create-args: >-
             python=${{ matrix.python-version }}
-          channel-priority: flexible
+          condarc: |
+            channel-priority: flexible
         env:
           # build requirement filename.  First replacement is for the python
           # version, second is to add "-min" if needed

docs/sphinx/source/whatsnew/v0.9.6.rst

@@ -46,7 +46,7 @@ Bug fixes
 
 Testing
 ~~~~~~~
-
+* Migrated to mamba-org/setup-micromamba. (:issue:`1746`, :pull:`1758`)
 
 Documentation
 ~~~~~~~~~~~~~
@@ -81,4 +81,5 @@ Contributors
 * Andy Lam (:ghuser:`@andylam598`)
 * :ghuser:`ooprathamm`
 * Kevin Anderson (:ghuser:`kandersolar`)
+* Devon Watt (:ghuser:`d-watt`)