Update flake.lock; bump helium to 0.15.3.1

- Refresh multiple locked dependencies to newer revisions
- Update helium AppImage to version 0.15.3.1 with new hash

modules/core/packages/appimages/helium.nix

@@ -4,8 +4,8 @@
   fetchurl,
 }: let
   pname = "helium";
-  version = "0.15.2.1";
-  hash = "sha256-Sn3MWsvqZw5YUYVKrEkJLW1gFQ1Sr+whEsCiFxYNvgg=";
+  version = "0.15.3.1";
+  hash = "sha256-ZCCm/prkgYgbDHW6OBPWvoIE77g7IYQpYdqc/PnIrSU=";
 
   src = fetchurl {
     url = "https://github.com/imputnet/helium-linux/releases/download/${version}/helium-${version}-x86_64.AppImage";