fix requirements installation command in README

GeyseR · hjwp · commit 15922acc755a · 2024-03-01T15:05:36.000Z
diff --git a/README.md b/README.md
@@ -45,10 +45,10 @@ pip install pytest
 pip install pytest sqlalchemy
 
 # for chapter 4+5
-pip install requirements.txt
+pip install -r requirements.txt
 
 # for chapter 6+
-pip install requirements.txt
+pip install -r requirements.txt
 pip install -e src/
 ```
 
