Update quickstart.rst macOS brew cask command

yestoday-tv · web-flow · commit b809239cdf3d · 2021-01-13T11:53:56.000+08:00
-brew cask install
+brew install --cask
diff --git a/doc/source/quickstart.rst b/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
 ~~~~~~~~~~~~~~~~~~~~~~
