Fix regression of github latest URL

[k-omotani]

Fix install.sh. on empty tag.
latest release url: https://docs.github.com/en/rest/releases/releases?apiVersion=2022-11-28#get-the-latest-release

error message

Run curl -sSfL https://raw.githubusercontent.com/securego/gosec/master/install.sh |
  curl -sSfL https://raw.githubusercontent.com/securego/gosec/master/install.sh |
    sh -s -- -b $GOPATH/bin
  shell: /usr/bin/bash -e {0}
  env:
    GOPRIVATE: github.com/Kyash/*
    GOPATH: /home/runner/go
securego/gosec info checking GitHub for latest tag
securego/gosec crit unable to find '' - use 'latest' or see https://github.com/securego/gosec/releases for details
Error: Process completed with exit code 1.