Fix action.yml YAML syntax: use block scalar for run containing ampersand

Author: MariusStorhaug

action.yml

@@ -68,4 +68,5 @@ runs:
         PSMODULE_RESOLVE_PSMODULEVERSION_INPUT_Settings: ${{ inputs.Settings }}
         PSMODULE_RESOLVE_PSMODULEVERSION_INPUT_Name: ${{ inputs.Name }}
         PSMODULE_ACTION_PATH: ${{ github.action_path }}
-      run: & "$env:PSMODULE_ACTION_PATH/scripts/main.ps1"
+      run: |
+        & "$env:PSMODULE_ACTION_PATH/scripts/main.ps1"