Add conditional for Atmos installation step

.github/workflows/test-failed-plan-drift.yml

@@ -185,9 +185,9 @@ jobs:
             resource in this configuration you must instead obtain this result from an
             attribute of that resource.
 
-            # Error                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
-            subcommand exited with code 1
+            # Error
+
+            **Error:** subcommand exited with code 1
             ```
 
 

action.yml

@@ -101,6 +101,7 @@ runs:
         echo "ATMOS_CLI_CONFIG_PATH=$(realpath ${{ inputs.atmos-config-path }})" >> $GITHUB_ENV
 
     - name: Install Atmos
+      if: ${{ inputs.atmos-version != '' }}
       uses: cloudposse/github-action-setup-atmos@v2
       with:
         atmos-version: ${{ inputs.atmos-version }}