Encourage https for bottle hosting
Encourage https for bottle hosting

I assume that we want to encourage people hosting
their own bottles to serve them using `https`.
This PR has a trivial change in the example.
We may consider adding some text to the `root_url`
description with a discussion of security.
Also use https://example.com instead of
http://mikemcquaid.com in bottle example.

Closes Homebrew/homebrew#44651.

Signed-off-by: Xu Cheng <9a05244150b861e40c78843b801eed71bca54eac@me.com>

sjackman/homebrew,nandub/brew,rwhogg/brew,hanxue/linuxbrew,jmsundar/brew,aw1621107/brew,maxim-belkin/brew,reitermarkus/brew,zmwangx/brew,konqui/brew,rwhogg/brew,DomT4/brew,DomT4/brew,Linuxbrew/brew,mgrimes/brew,reitermarkus/brew,staticfloat/brew,mahori/brew,mistydemeo/homebrew,konqui/brew,gordonmcshane/homebrew,AnastasiaSulyagina/brew,konqui/brew,hanxue/linuxbrew,alyssais/brew,JCount/brew,tonyg/homebrew,claui/brew,vitorgalvao/brew,ilovezfs/brew,gordonmcshane/homebrew,AnastasiaSulyagina/brew,JCount/brew,toonetown/homebrew,Linuxbrew/brew,nandub/brew,bfontaine/brew,aw1621107/brew,EricFromCanada/brew,konqui/brew,amar-laksh/brew_sudo,vitorgalvao/brew,palxex/brew,EricFromCanada/brew,mahori/brew,gordonmcshane/homebrew,aw1621107/brew,pseudocody/brew,claui/brew,DomT4/brew,pseudocody/brew,sjackman/homebrew,mahori/brew,gregory-nisbet/brew,reelsense/brew,nandub/brew,hanxue/linuxbrew,mgrimes/brew,claui/brew,JCount/brew,tonyg/homebrew,reitermarkus/brew,ilovezfs/brew,palxex/brew,zmwangx/brew,MikeMcQuaid/brew,EricFromCanada/brew,maxim-belkin/brew,muellermartin/dist,bfontaine/brew,zmwangx/brew,Homebrew/brew,vitorgalvao/brew,gregory-nisbet/brew,alyssais/brew,Linuxbrew/brew,mgrimes/brew,Linuxbrew/brew,Homebrew/brew,MikeMcQuaid/brew,EricFromCanada/brew,mahori/brew,AnastasiaSulyagina/brew,toonetown/homebrew,reelsense/brew,bfontaine/brew,reitermarkus/brew,muellermartin/dist,JCount/brew,palxex/brew,MikeMcQuaid/brew,tonyg/homebrew,Homebrew/brew,mistydemeo/homebrew,ilovezfs/brew,pseudocody/brew,alyssais/brew,staticfloat/brew,Homebrew/brew,mistydemeo/homebrew,MikeMcQuaid/brew,toonetown/homebrew,sjackman/homebrew,jmsundar/brew,amar-laksh/brew_sudo,maxim-belkin/brew,rwhogg/brew,sjackman/homebrew,reelsense/brew,muellermartin/dist,jmsundar/brew,gregory-nisbet/brew,amar-laksh/brew_sudo,vitorgalvao/brew,staticfloat/brew,claui/brew,nandub/brew,DomT4/brew