kallisto: indexing config sh conda env instead of source

src/nf_modules/kallisto/indexing.config

@@ -50,7 +50,7 @@ profiles {
   ccin2p3_conda {
     process{
       withName: index_fasta {
-        beforeScript = "source /sps/lbmc/common/miniconda3/init.sh"
+        beforeScript = "sh /sps/lbmc/common/miniconda3/init.sh"
         conda = "/sps/lbmc/common/miniconda3/envs/kallisto_0.44.0"
         scratch = true
         stageInMode = "copy"