prysm: 5.0.3 -> 5.3.0

[JulianGodd]

Updated prysm to 5.3.0 and the version of go to 1.23 to match the repo

This fixes my issue with the overlay.

[bbjubjub2494]

Thank you! For this to build in the context of ethereum.nix, there need to be a couple of extra changes to make sure the go version is up-to-date. You can add them in your PR if you like

diff --git a/flake.lock b/flake.lock
index 324d36f..b1392fc 100644
--- a/flake.lock
+++ b/flake.lock
@@ -195,11 +195,11 @@
     },
     "nixpkgs-unstable": {
       "locked": {
-        "lastModified": 1736241350,
-        "narHash": "sha256-CHd7yhaDigUuJyDeX0SADbTM9FXfiWaeNyY34FL1wQU=",
+        "lastModified": 1740019556,
+        "narHash": "sha256-vn285HxnnlHLWnv59Og7muqECNMS33mWLM14soFIv2g=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "8c9fd3e564728e90829ee7dbac6edc972971cd0f",
+        "rev": "dad564433178067be1fbdfcce23b546254b6d641",
         "type": "github"
       },
       "original": {
diff --git a/pkgs/default.nix b/pkgs/default.nix
index 46fca4c..7a7da14 100644
--- a/pkgs/default.nix
+++ b/pkgs/default.nix
@@ -58,7 +58,7 @@
       mev-rs = callPackage ./mev-rs {};
       nethermind = callPackageUnstable ./nethermind {};
       nimbus = callPackageUnstable ./nimbus {};
-      prysm = callPackage ./prysm {inherit bls blst;};
+      prysm = callPackageUnstable ./prysm {inherit bls blst;};
       reth = callPackageUnstable ./reth {};
       rocketpool = callPackage ./rocketpool {};
       rocketpoold = callPackage ./rocketpoold {inherit bls blst;};