Add note about suppressing deprecation warning in installation instructions

Author: DaanJansen94

README.md

@@ -19,9 +19,11 @@ conda install -c bioconda -c conda-forge minimap2=2.24 seqtk=1.3 curl=7.88 samto
 ```bash
 git clone https://github.com/DaanJansen94/virasign.git
 cd virasign
-pip install .
+pip install . 2>&1 | grep -v "DEPRECATION"
 ```
 
+**Note**: The deprecation warning is harmless and can be ignored. To suppress it, use the command above or simply `pip install . --quiet`.
+
 ## Usage
 
 ### Basic Usage