feat: Only checkout appinfo/ for xml lint

Signed-off-by: Daniel Kesselberg <mail@danielkesselberg.de>

Author: kesselb

workflow-templates/lint-info-xml.yml

@@ -27,6 +27,8 @@ jobs:
         uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           persist-credentials: false
+          sparse-checkout: |
+            appinfo/
 
       - name: Download schema
         run: wget https://raw.githubusercontent.com/nextcloud/appstore/master/nextcloudappstore/api/v1/release/info.xsd