Install script fixes

[mruz]

On openSUSE I have just linux in $OSTYPE and filenames have macos in the name https://github.com/gabyx/Githooks/releases/tag/v2.8.0

[gabyx]

This is good to go, some small change needed since I want to leave darwin in there, because its not necessary to change it. might be to brittle.

[mruz]

For darwin I'm getting:

[mruz]

$ curl --silent --location https://api.github.com/repos/gabyx/Githooks/releases/tags/v2.8.0 \
    | jq --raw-output ".assets[] | select( (.name | contains(\"darwin\")) and (.name | contains(\"arm64\")) ) | .browser_download_url"

$ curl --silent --location https://api.github.com/repos/gabyx/Githooks/releases/tags/v2.8.0 \
    | jq --raw-output ".assets[] | select( (.name | contains(\"macos\")) and (.name | contains(\"arm64\")) ) | .browser_download_url"
https://github.com/gabyx/Githooks/releases/download/v2.8.0/githooks-2.8.0-macos.arm64.tar.gz

[gabyx]

Ah, ok thanks for the hint! But could you leave darwin in the paltform script and make an darwin to macos overwrite in the install.sh script. That might be better!

Thanks for the patch.

[gabyx]

@mruz : I changed it, will merge in a second.