Mention stack upgrade in ChangeLog

Author: snoyberg

ChangeLog.md

@@ -13,6 +13,7 @@
 * Specifying test components only builds/runs those tests [#398](https://github.com/commercialhaskell/stack/issues/398)
 * `STACK_EXE` environment variable
 * Add the `stack dot` command
+* `stack upgrade` added [#237](https://github.com/commercialhaskell/stack/issues/237)
 
 Bug fixes:
 

src/Stack/Upgrade.hs

@@ -45,9 +45,8 @@ upgrade fromGit mresolver = withSystemTempDirectory "stack-upgrade" $ \tmp' -> d
                     ]
                     Nothing
                 return $ tmp </> $(mkRelDir "stack")
-                    -- Stack.PackageIndex.updateAllIndices menv
             else do
-                -- updateAllIndices menv
+                updateAllIndices menv
                 caches <- getPackageCaches menv
                 let latest = Map.fromListWith max
                            $ map toTuple