Merge pull request #2407 from yestoday-tv/patch-3

Update quickstart.rst macOS brew cask command

Author: AndreMiras

doc/source/quickstart.rst

@@ -97,7 +97,7 @@ On macOS::
 
     brew install autoconf automake libtool openssl pkg-config
     brew tap homebrew/cask-versions
-    brew cask install homebrew/cask-versions/adoptopenjdk8
+    brew install --cask homebrew/cask-versions/adoptopenjdk8
 
 Installing Android SDK
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