Upgraded to setup-micromamba v2

Author: JohanMabille

.github/workflows/main.yml

@@ -37,8 +37,8 @@ jobs:
       - name: Get number of CPU cores
         uses: SimenB/github-actions-cpu-cores@v2
 
-      - name: Install mamba
-        uses: mamba-org/setup-micromamba@v1
+      - name: Install micromamba
+        uses: mamba-org/setup-micromamba@v2
         with:
           environment-file: environment-dev.yml
           environment-name: xeus
@@ -90,8 +90,8 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - name: Install mamba
-        uses: mamba-org/setup-micromamba@v1
+      - name: Install micromamba
+        uses: mamba-org/setup-micromamba@v2
         with:
           environment-file: environment-dev.yml
           environment-name: xeus