Install script is broken

[jalseth]

The install script is currently broken due to latest_version not being selected properly.

$ curl -Is "https://github.com/snyk-labs/helm-snyk/releases/latest" | grep -i "location" | sed s#.*tag/##g | tr -d "\r"
v1.2.5
Content-Security-Policy: default-src 'none'; base-uri 'self'; block-all-mixed-content; connect-src 'self' uploads.github.com www.githubstatus.com collector.githubapp.com api.github.com github-cloud.s3.amazonaws.com github-production-repository-file-5c1aeb.s3.amazonaws.com github-production-upload-manifest-file-7fdce7.s3.amazonaws.com github-production-user-asset-6210df.s3.amazonaws.com html-translator.herokuapp.com cdn.optimizely.com logx.optimizely.com/v1/events wss://alive.github.com *.actions.githubusercontent.com wss://*.actions.githubusercontent.com online.visualstudio.com/api/v1/locations insights.github.com; font-src github.githubassets.com; form-action 'self' github.com gist.github.com; frame-ancestors 'none'; frame-src render.githubusercontent.com; img-src 'self' data: github.githubassets.com identicons.github.com collector.githubapp.com github-cloud.s3.amazonaws.com secured-user-images.githubusercontent.com/ *.githubusercontent.com; manifest-src 'self'; media-src github.com user-images.githubusercontent.com/; script-src github.githubassets.com; style-src 'unsafe-inline' github.githubassets.com; worker-src github.com/socket-worker-3f088aa2.js gist.github.com/socket-worker-3f088aa2.js

As you can see, not only is the version returned, but other headers are as well, so the subsequent requests to download the release fail.