Merge pull request #428 from nouiz/doc

Update doc

Author: nouiz

doc/installation.rst

@@ -27,7 +27,7 @@ This should work on Linux, Mac OS and Windows.
 This is also available in packages in conda-forge. They could be more
 up to date::
 
-  conda install -c forge pygpu
+  conda install -c conda-forge pygpu
 
 Build Requirements
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