main/apk-tools-zsh-completion: package names ending in `-[0-9]+` get truncated

reproduce:

$ docker run --rm -it alpine:edge
# apk add zsh apk-tools-zsh-completion
# zsh
# autoload compinit; compinit
# apk add libpcre2-

after pressing tab, packages libpcre2-16 and libpcre2-32 aren't shown in the completions