Update lint-info-xml workflow

Signed-off-by: Côme Chilliet <come.chilliet@nextcloud.com>

.github/workflows/lint-info-xml.yml

@@ -3,7 +3,7 @@
 # https://github.com/nextcloud/.github
 # https://docs.github.com/en/actions/learn-github-actions/sharing-workflows-with-your-organization
 
-name: Lint
+name: Lint info.xml
 
 on:
   pull_request:
@@ -16,20 +16,24 @@ on:
 permissions:
   contents: read
 
+concurrency:
+  group: lint-info-xml-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
 jobs:
   xml-linters:
     runs-on: ubuntu-latest
 
     name: info.xml lint
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9 # v3.5.3
 
       - name: Download schema
-        run: wget https://raw.githubusercontent.com/nextcloud/server/master/resources/app-info-shipped.xsd
+        run: wget https://raw.githubusercontent.com/nextcloud/appstore/master/nextcloudappstore/api/v1/release/info.xsd
 
       - name: Lint info.xml
-        uses: ChristophWurst/xmllint-action@v1
+        uses: ChristophWurst/xmllint-action@39155a91429af431d65fafc21fa52ba5c4f5cb71 # v1.1
         with:
           xml-file: ./appinfo/info.xml
-          xml-schema-file: ./app-info-shipped.xsd
+          xml-schema-file: ./info.xsd