Fix actions install script

[evaherrada]

I've tested this on a fork of this library and locally. Arduino changed the install script, so now it won't work unless you specify the version.

[ladyada]

?? version of what?

[evaherrada]

They now want you to specify the version of arduino-cli to install

[per1234]

Hi all. The intention definitely wasn't to break support for the previous Arduino CLI installation script behavior, but only to allow the option of specifying a version. I'll put in a PR ASAP to fix the Arduino CLI installation script so the previous behavior of installing the latest release of Arduino CLI when no version is specified works again.

You can then choose whether you want to continue to pin the Arduino CLI version used by your script, or whether you want to revert this PR to make it go back to automatically follow the latest Arduino CLI release version.

[evaherrada]

@per1234 Awesome. Thank you.

[ladyada]

thanks @per1234 this works for now :) we'll repatch back later

[per1234]

OK, the installation script is now fixed: arduino/arduino-cli#772

It turned out that the breakage happening around the same time as the addition of version specification support to the script was purely coincidental. The actual cause was that GitHub changed the HTML structure of the releases page, which broke the script's system for scraping the latest tag number from that page.