Update README.md

README.md

@@ -9,7 +9,7 @@ The project contains a workflow based on Framework [AlvisNLP](https://github.com
 
 ## 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)). 
+installed on your computer ([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](https://sylabs.io/) image. 
 
 Run the following steps to test the workflow,