Update README.md

README.md

@@ -8,7 +8,7 @@ It contains a workflow based on Framework [AlvisNLP](https://github.com/Bibliome
 ## Usage
 The workflow works on command line (e.g., `GNU bash, version 4.4.x`) with `singularity version 3.4.x` 
 installed on your computer (see [how to install singularity](https://sylabs.io/guides/3.4/user-guide/quick_start.html#quick-installation-steps)). 
-It is compatible with `AlvisNLP version 0.7.x` provided in a singularity image. Run the following steps to test the workflow,
+It is compatible with `AlvisNLP version 0.7.x` provided in a [Singularity](https://sylabs.io/) image. Run the following steps to test the workflow,
 a test corpus is provided in `corpus/pesv/Xylella-test/txt/` (`16Go` RAM memory is required to run the test corpus).