Add the nf-gpt version in the nextflow config

nextflow.config

@@ -230,6 +230,7 @@ singularity.registry = 'quay.io'
 // Nextflow plugins
 plugins {
     id 'nf-validation@1.1.3' // Validation of pipeline parameters and creation of an input channel from a sample sheet
+    id 'nf-gpt@0.4.0'
 }
 
 // Load igenomes.config if required