feat(store): point the Recl∆Im quick-add at its canonical index URL

Use the raw store-index file in the public chain-modules/reclaim repo
(git.flemming.ai/chain-modules/reclaim/raw/branch/main/store.yaml) —
stable, no release-tag churn, fetched by the hub's StoreIndex::from_url.
The availability probe flips the row to 'Add' automatically once reclaim
publishes the file.

Signed-off-by: flemming-it <stefan.a.flemming@googlemail.com>

lib/widgets/chain_stores_dialog.dart

@@ -292,7 +292,10 @@ class _SuggestedStore {
 final List<_SuggestedStore> _kSuggestedStores = <_SuggestedStore>[
   _SuggestedStore(
     name: 'Recl∆Im',
-    url: 'https://releases.chain.flemming.ai/reclaim/store.yaml',
+    // Raw store-index file in the public chain-modules/reclaim repo —
+    // stable (no release-tag churn), updated by a plain git push as
+    // reclaim adds modules. The hub fetches it via StoreIndex::from_url.
+    url: 'https://git.flemming.ai/chain-modules/reclaim/raw/branch/main/store.yaml',
     describe: (l) => l.storesSuggestedReclaimDesc,
   ),
 ];