Update Zig site URL and version pattern

[rXelelo]

Testing the changes

• I tested the changes in this PR: YES

zig is too outdate also the webpage logic changed and update file broken

rain@void ~/void-packages (master)> ./xbps-src update-check zig
zig-0.13.0 -> zig-0.14.0
zig-0.13.0 -> zig-0.14.1
zig-0.13.0 -> zig-0.15.1
zig-0.13.0 -> zig-0.15.2
zig-0.13.0 -> zig-0.16.0

[rXelelo]

i fix the issue that i get 0.16.0 from unstable now its get only latest stable