fix incorrect documentation link in codemeta.json

Author: apdavison

pipeline/src/codemeta.json

@@ -21,8 +21,7 @@
       "Python (version >=3.7)"
     ],
     "relatedLink": [
-      "http://neuralensemble.org/docs/PyNN/",
-      "https://groups.google.com/g/neuralensemble"
+      "https://openminds-documentation.readthedocs.io"
     ],
     "author": [
       {