x11/wvkbd: unbreak fetch due to recompression

> Fetched file size mismatch (expected 1074717, actual 1073591)

$ gzip -l wvkbd-v0.13.tar.gz

compressed uncompressed  ratio uncompressed_name

• 1074717 1638400 34.4% wvkbd-v0.13.tar

+ 1073591 1638400 34.4% wvkbd-v0.13.tar