setup-micromamba did not actually work, going back to old method.

 Error: Error installing micromamba: Destination file path /home/runner/micromamba-bin/micromamba already exists

.github/workflows/build_docs.yml

@@ -30,13 +30,13 @@ jobs:
       with:
         ref: python2
     - name: Install Python2 Conda environment with Micromamba
-      uses: mamba-org/setup-micromamba@v1
+      uses: mamba-org/provision-with-micromamba@main
       with:
-        cache-environment: true
-        cache-environment-key: env-envkey-${{ github.sha }}-${{ github.run_attempt }}
+        cache-env: true
+        cache-env-key: env-envkey-${{ github.sha }}-${{ github.run_attempt }}
         environment-file: basic_environment.yml
         environment-name: xpsipy2
-        create-args: >-
+        extra-specs: |
           python=2.7
     - name : install docs dependencies
       run: |
@@ -63,13 +63,13 @@ jobs:
       with:
         ref: main
     - name: Install Python3 Conda environment with Micromamba
-      uses: mamba-org/setup-micromamba@v1
+      uses: mamba-org/provision-with-micromamba@main
       with:
-        cache-environment: true
-        cache-environment-key: env-envkey-${{ github.sha }}-${{ github.run_attempt }}
+        cache-env: true
+        cache-env-key: env-envkey-${{ github.sha }}-${{ github.run_attempt }}
         environment-file: basic_environment.yml
         environment-name: xpsipy3
-        create-args: >-
+        extra-specs: |
           python=3.10
     - name : install docs dependencies
       run: |