fix: use DefaultValue instead of resid in SourceLocation for AppSource validation

- Change SourceLocation to use DefaultValue with direct URL
- Fixes 'Package Type Not Identified' error in Partner Center
- resid references only work inside VersionOverrides section

Author: darshild1024-cpu

manifest.xml

@@ -29,7 +29,7 @@
     </Sets>
   </Requirements>
   <DefaultSettings>
-    <SourceLocation resid="Taskpane.Url" />
+    <SourceLocation DefaultValue="https://plugins.datasetiq.com/taskpane/index.html" />
   </DefaultSettings>
   <Permissions>ReadWriteDocument</Permissions>