Update index.md

Author: nitrosx

docs/index.md

@@ -1,4 +1,4 @@
-# Welcome to SciCat Documenation 
+# Welcome to SciCat Documentation 
 
 Find [**SciCat USERS Guide**](user-manual/index.md) or [**SciCat Operator's Guide**](operator-manual/index.md).
 Developers can read long the ```READMEs``` in github of the [projects page](https://www.scicatproject.org) and in both guides as well.