Development_Setup.rst: Fix install from git link

Change original install from git link --> <#installing-from-git>
to send it to the content in the same page
instead of reloading the whole page to the link.

Closes coala#5992

docs/Developers/Development_Setup.rst

@@ -77,7 +77,7 @@ in your current directory, as coala only works for Python >= 3.4.4
   `Virtualenv User Guide <https://virtualenv.pypa.io/en/stable/userguide/#activate-script>`__.
 
 - After this, you can start
-  `installing from git <https://api.coala.io/en/latest/Developers/Development_Setup.html#installing-from-git>`__.
+  `installing from git <#installing-from-git>`__.
 
 Repositories
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