Update README.md

README.md

@@ -83,7 +83,7 @@ with rasterio.open("wealth_map.tif") as src:
     print("Mean IWI (2017–2019):", mean_wealth_2017_2019)
 ```
 
-## Additional Tabular Data: poverty_improvement_by_state.csv
+## Additional Tabular Data: `poverty_improvement_by_state.csv`
 
 This CSV file provides an aggregate measure of how average wealth has changed between the early 1990s and the late 2010s at the first-level administrative region (state/province) across Africa. Each row corresponds to a specific country–province pair, along with the estimated improvement in wealth over this period.