update rust toolchain hash (#365)

Hey again, just realized there was an update with toolchain change 1.81
-> 1.83, so updating the hash for it :)

Co-authored-by: Vitalii Lukyanov <tukanoid@outlok.com>

flake.nix

@@ -33,7 +33,7 @@
             pkgs.rustChannelOf
             {
               rustToolchain = ./rust-toolchain.toml;
-              sha256 = "VZZnlyP69+Y3crrLHQyJirqlHrTtGTsyiSnZB8jEvVo=";
+              sha256 = "s1RPtyvDGJaX/BisLT+ifVfuhDT1nZkZ1NcK8sbwELM=";
             }
           )
           .rust;