fix(docs): license setup command clarification

Author: lowlighter

source/plugins/licenses/examples.yml

@@ -6,7 +6,7 @@
     template: repository
     repo: metrics
     plugin_licenses: yes
-    plugin_licenses_setup: "[[ -f package.json ]] && npm ci || true"
+    plugin_licenses_setup: "bash -c '[[ -f package.json ]] && npm ci || true'"
   test:
     timeout: 1800000
     modes:
@@ -21,7 +21,7 @@
     template: repository
     repo: metrics
     plugin_licenses: yes
-    plugin_licenses_setup: "[[ -f package.json ]] && npm ci || true"
+    plugin_licenses_setup: "bash -c '[[ -f package.json ]] && npm ci || true'"
     plugin_licenses_legal: no
     plugin_licenses_ratio: yes
   test:

source/plugins/licenses/metadata.yml

@@ -37,7 +37,7 @@ inputs:
       > The example command is intended for NodeJs projects that use `npm` to install their dependencies.
     type: string
     default: ""
-    example: "[[ -f package.json ]] && npm ci || true"
+    example: "bash -c '[[ -f package.json ]] && npm ci || true'"
 
   plugin_licenses_ratio:
     description: |