fix(xo-cli): fix invalid parameters error message

Introduced by d7f29e736

The error format has changed due to the switch of xo-server to Ajv.

CHANGELOG.unreleased.md

@@ -31,6 +31,7 @@
 
 - @xen-orchestra/backups-cli major
 - @xen-orchestra/log minor
+- xo-cli patch
 - xo-web minor
 
 <!--packages-end-->

packages/xo-cli/index.mjs

@@ -273,7 +273,9 @@ async function main(args) {
       const lines = [error.message]
       const { errors } = error.data
       errors.forEach(error => {
-        lines.push(`  property ${error.property}: ${error.message}`)
+        let { instancePath } = error
+        instancePath = instancePath.length === 0 ? '@' : '@.' + instancePath
+        lines.push(`  property ${instancePath}: ${error.message}`)
       })
       throw lines.join('\n')
     })