fix: use home env var

Author: m-jahn

action.yml

@@ -77,7 +77,7 @@ runs:
       id: check-miniconda
       shell: bash -el {0}
       run: |
-        if [ -d "/home/runner/miniconda3" ]; then
+        if [ -d "$HOME/miniconda3" ]; then
           echo "installed=true" >> $GITHUB_OUTPUT
         else
           echo "installed=false" >> $GITHUB_OUTPUT
@@ -92,7 +92,6 @@ runs:
         miniforge-version: latest
         environment-file: .snakemake.environment.yaml
         activate-environment: snakemake
-        installation-dir: /home/runner/miniconda3
 
     - name: Display snakemake version
       shell: bash -el {0}