[gimp-web/testing] Update Homebrew install command

[Pat David <patdavid src gnome org>]

commit 82151451fccfde1e476312d6d4e576f63a48b3a7
Author: Robert C. Helling <helling atdotde de>
Date:   Tue Dec 12 09:37:27 2017 +0100

    Update Homebrew install command
    
    Gimp is now in a homebrew cask and thus the command to install
    it has changed.
    
    Signed-off-by: Robert C. Helling <helling atdotde de>
    Signed-off-by: Pat David <patdavid gmail com>

 themes/newgimp/templates/downloads.html |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/themes/newgimp/templates/downloads.html b/themes/newgimp/templates/downloads.html
index 94ea3b7..f622133 100644
--- a/themes/newgimp/templates/downloads.html
+++ b/themes/newgimp/templates/downloads.html
@@ -133,7 +133,7 @@
 
         <h3>Homebrew</h3>
         <p>
-            Homebrew is similar to Macports and provides packages (aka formulas) to install, either by 
compiling them from source or by using pre-made binaries. There are indications that there is now a formula 
for GIMP, installable with: <code>brew install gimp</code>.
+            Homebrew is similar to Macports and provides packages (aka formulas) to install, either by 
compiling them from source or by using pre-made binaries. There are indications that there is now a formula 
for GIMP, installable with: <code>brew tap caskroom/cask && brew cask install gimp</code>.
         </p>
 
         <ul>