lua5: Fix src URLs

The 672c3c1d2a refactor accidentally
dropped the last version component from the source URLs.  This change
puts its back.

$ for lua in lua5_{1,2,3};do nix-instantiate --json --eval . -A $lua.src.urls | jq -r '.[]' | xargs nix-prefetch-url; done

Before this change:

lua-5.1.tar.gz 1hbjhh211p82vhwqhx4mmhmvhv56060acnka80gbmfdk3q3bjnvz (wrong hash because this is lua 5.1.0.  We want 5.1.5 )
lua-5.2.tar.gz HTTP error 404
lua-5.3.tar.gz HTTP error 404

After this change:

lua-5.1.5.tar.gz 0cskd4w0g6rdm2q8q3i4n1h3j8kylhs3rq8mxwl9vwlmlxbgqh16
lua-5.2.4.tar.gz 0jwznq0l8qg9wh5grwg07b5cy3lzngvl5m2nl1ikp6vqssmf9qmr <-- Desired hash
lua-5.3.5.tar.gz 1b2qn2rv96nmbm6zab4l877bd4zq7wpwm8drwjiy2ih4jqzysbhc

Converted to base16 with `nix-hash --type sha256 --to-base16`:

lua-5.1.5.tar.gz 2640fc56a795f29d28ef15e13c34a47e223960b0240e8cb0a82d9b0738695333 <-- Desired hash
lua-5.2.4.tar.gz b9e2e4aad6789b3b63a056d442f7b39f0ecfca3ae0f1fc0ae4e9614401b69f4b
lua-5.3.5.tar.gz 0c2eed3f960446e1a3e4b9a1ca2f3ff893b6ce41942cf54d5dd59ab4b3b058ac <-- Desired hash

pkgs/development/interpreters/lua-5/interpreter.nix

@@ -17,7 +17,7 @@ self = stdenv.mkDerivation rec {
   version = "${luaversion}.${sourceVersion.patch}";
 
   src = fetchurl {
-    url = "https://www.lua.org/ftp/${pname}-${luaversion}.tar.gz";
+    url = "https://www.lua.org/ftp/${pname}-${version}.tar.gz";
     sha256 = hash;
   };