Update download links to LibrePCB 1.3.0

Author: ubruhin

antora-playbook.yml

@@ -15,7 +15,7 @@ asciidoc:
     page-pagination: ''
     table-frame: 'none@'
     table-grid: 'rows@'
-    version: '1.2.0'  # <-- Latest LibrePCB version.
+    version: '1.3.0'  # <-- Latest LibrePCB version.
 ui:
   bundle:
     url: https://gitlab.com/antora/antora-ui-default/-/jobs/artifacts/HEAD/raw/build/ui-bundle.zip?job=bundle-stable