revert micromamba version

Author: lorenzocerrone

.github/workflows/build_and_test.yml

@@ -27,9 +27,11 @@ jobs:
         with:
           fetch-depth: 1
 
-      - uses: mamba-org/setup-micromamba@v2
+      - uses: mamba-org/setup-micromamba@v1
         with:
-          micromamba-version: '2.0.5-0' # any version from https://github.com/mamba-org/micromamba-releases
+          # Using the newest version of micromamba
+          # causes a weird bug in the manifest generation
+          micromamba-version: '1.5.6-0' # any version from https://github.com/mamba-org/micromamba-releases
           environment-name: 'ilastik-tasks'
           create-args: >-
             --override-channels