Update micromamba to v2 (#74)

https://github.com/mamba-org/setup-micromamba/releases

Author: mosfet80

.github/workflows/build.yml

@@ -20,7 +20,7 @@ jobs:
       uses: actions/checkout@v4
 
     - name: Set up environment
-      uses: mamba-org/setup-micromamba@v1
+      uses: mamba-org/setup-micromamba@v2
       with:
         environment-name: urdf
         init-shell: bash
@@ -68,7 +68,7 @@ jobs:
       uses: actions/checkout@v4
 
     - name: Set up environment
-      uses: mamba-org/setup-micromamba@v1
+      uses: mamba-org/setup-micromamba@v2
       with:
         environment-name: urdf-isolated
         init-shell: bash
@@ -101,7 +101,7 @@ jobs:
       uses: actions/checkout@v4
 
     - name: Set up environment
-      uses: mamba-org/setup-micromamba@v1
+      uses: mamba-org/setup-micromamba@v2
       with:
         environment-name: urdf-integration
         init-shell: bash