build(nix): update rust-email hash in flake.nix

Author: link2xt

flake.nix

@@ -93,7 +93,7 @@
         cargoLock = {
           lockFile = ./Cargo.lock;
           outputHashes = {
-            "email-0.0.20" = "sha256-rV4Uzqt2Qdrfi5Ti1r+Si1c2iW1kKyWLwOgLkQ5JGGw=";
+            "email-0.0.20" = "sha256-cfR3D5jFQpw32bGsgapK2Uwuxmht+rRK/n1ZUmCb2WA=";
             "lettre-0.9.2" = "sha256-+hU1cFacyyeC9UGVBpS14BWlJjHy90i/3ynMkKAzclk=";
           };
         };