Update CPUMicrocodes flake input (#64)

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Author: github-actions[bot]

flake.nix

@@ -2,7 +2,7 @@
   description = "Microcode updates for AMD CPUs on NixOS";
 
   inputs.cpu-microcodes = {
-    url = "github:platomav/CPUMicrocodes/2bd1bd04b8af70805c3da1f0f36673d896ca7952";
+    url = "github:platomav/CPUMicrocodes/4b18748b5cfc10464e4c5c5d93ead73a29482fb0";
     flake = false;
   };