Improve Linux installation docs to avoid apt does not have a stable CLI interface warning#10578

JackPGreen wants to merge 2 commits intocli:trunkcli/cli:trunkfrom

JackPGreen:Fix-`apt-does-not-have-a-stable-CLI-interface`-warningJackPGreen/cli:Fix-`apt-does-not-have-a-stable-CLI-interface`-warningCopy head branch name to clipboard