Update 'README.md'

CDD update

README.md

@@ -29,6 +29,9 @@ python las_manipulation.py param-files/*avoca.yaml
 
 # Process all beaches for specific survey date
 python las_manipulation.py param-files/survey-1*.yaml
+
+# Process all beaches for multiple survey dates
+python las_manipulation.py param-files/survey-1*.yaml param-files/survey-2*.yaml
 ```
 
 ### 3. Check swash clipping mask
@@ -45,7 +48,11 @@ The swash clipping mask should be checked visually to ensure it is correct.
 Example usage:
 
 ```
+# Process single survey at specific beach
 python las_outputs.py param-files/survey-1-avoca.yaml
+
+# Process all beaches for multiple survey dates
+python las_outputs.py param-files/survey-1*.yaml param-files/survey-2*.yaml
 ```
 
 ### 5. Generate erosion heatmaps