Add OTA fallback for gallery embed

Pre-update native builds don't recognize app.bsky.embed.gallery (Photos
v2, >4 images). Bump @atproto/api to 0.20.9 so the OTA bundle can parse
the embed, and render a friendly "Something new is here" prompt with the
photo count and a link to bsky.app/download in place of the unrenderable
gallery. Native-only; web ships with full gallery support in the same
release.

APP-2308

pnpm-lock.yaml

@@ -242,8 +242,8 @@ importers:
   .:
     dependencies:
       '@atproto/api':
-        specifier: 0.20.8
-        version: 0.20.8
+        specifier: 0.20.9
+        version: 0.20.9
       '@atproto/syntax':
         specifier: 0.6.1
         version: 0.6.1
@@ -877,8 +877,8 @@ packages:
       graphql:
         optional: true
 
-  '@atproto/api@0.20.8':
-    resolution: {integrity: sha512-rTkA6kOmA2axSrg6VgpdXpsCFWpofnHBOn6pKg69Ju5MpIHqk4haQMgjBcVh1G3kUxzwgSAr7SYrPS3dFe5Etg==}
+  '@atproto/api@0.20.9':
+    resolution: {integrity: sha512-Yuw7Ewn+yMJZ8GskbuvI3lKPW65rsXic1xjFA2Dpq6H8WjVYs6xNZ31bkwtTYDDwjKIZcJmAVbAVgdfjo4T9iw==}
     engines: {node: '>=22'}
 
   '@atproto/common-web@0.5.0':
@@ -9493,7 +9493,7 @@ snapshots:
 
   '@0no-co/graphql.web@1.2.0': {}
 
-  '@atproto/api@0.20.8':
+  '@atproto/api@0.20.9':
     dependencies:
       '@atproto/common-web': 0.5.0
       '@atproto/lexicon': 0.7.1