add figure of PhlAnProf dag for README

README.md

@@ -103,6 +103,7 @@ Configure the workflow according to your needs via editing the file `config.yaml
 - Open the copied config.yaml and set RAW_DIR and OUT_DIR. You must provide absolute paths.
 
   - The **RAW_DIR** should point to a directory where MetaSnk expects to find raw fastq data. This directory must have the following structure:
+
   ```
     $RAW_DIR
     ├── dataset_test_1
@@ -114,6 +115,7 @@ Configure the workflow according to your needs via editing the file `config.yaml
   ```
   - The **OUT_DIR** is the directory where MetaSnk will save the outputs of the
   workflow under the following structure:
+  
   ```
     $OUT_DIR
     ├── dataset_test_1