Clarify sentence

I think this is what was meant

Author: alessandrofelder

ch03tests/07CI.ipynb

@@ -14,7 +14,7 @@
     "2. run tests after each commit to github (or other)\n",
     "3. run tests on different platforms\n",
     "\n",
-    "Various groups run servers that can be used to do this automatically.\n",
+    "Various UCL research groups run servers that can be used to do this automatically.\n",
     "\n",
     "RITS run a [university-wide one](https://www.ucl.ac.uk/isd/services/research-it/research-software-development-tools/support-for-ucl-researchers-to-use-travis)."
    ]
@@ -72,4 +72,4 @@
  },
  "nbformat": 4,
  "nbformat_minor": 1
-}
+}