docs: actually make it bold

README.md

@@ -45,20 +45,20 @@ from airpyllution.airpyllution import get_pollution_history
 from airpyllution.airpyllution import get_pollution_forecast
 ```
 
-*Retrieve historic pollution data with specified date range and location:*
+**Retrieve historic pollution data with specified date range and location:**
 ```
 get_pollution_history(1606488670, 1606747870, 49.28, 123.12, api_key)
 ```
 
-*Generate an interactive map containing current pollution data by location:*
+**Generate an interactive map containing current pollution data by location:**
 
 ```
 get_air_pollution(49.28, 123.12, api_key, "Current Air Pollution")
 ```
 
 ![](docs/air-pollution-map.png)
 
-*Generate a time-series scatterplots of forecasted air pollution data:*
+**Generate a time-series scatterplots of forecasted air pollution data:**
 ```
 import altair as alt
 alt.renderers.enable("html");