Upgrade micromamba setup action to version 3

Author: backmari

pkg-verify/action.yaml

@@ -38,7 +38,7 @@ runs:
   using: "composite"
   steps:
     - name: Setup micromamba
-      uses: mamba-org/setup-micromamba@v2
+      uses: mamba-org/setup-micromamba@v3
       with:
         environment-name: test
         init-shell: bash