[mob][photos] Revert back to using figma_squircle v0.5.3 from pub.dev since we've reverted to flutter v3.24.x

mobile/pubspec.yaml

@@ -64,9 +64,7 @@ dependencies:
   fade_indexed_stack: ^0.2.2
   fast_base58: ^0.2.1
   ffmpeg_kit_flutter_full_gpl: ^6.0.3
-  figma_squircle:
-    git:
-      url: https://github.com/Ax0elz/figma_squircle.git
+  figma_squircle: 0.5.3
   file_saver:
     # Use forked version till this PR is merged: https://github.com/incrediblezayed/file_saver/pull/87
     git: https://github.com/jesims/file_saver.git