chore: various markdown warnings resolved (#30657)

Co-authored-by: Evan Rusackas <evan@preset.io>

docs/docs/using-superset/creating-your-first-dashboard.mdx

@@ -48,7 +48,6 @@ Please note, if you are trying to connect to another locally running database (w
 
 Once you've clicked that link you only need to specify two things (the database name and SQLAlchemy URI):
 
-
 <img src={useBaseUrl("/img/tutorial/tutorial_03b_connection_string_details.png" )} width="600" />{" "} <br/><br/>
 
 As noted in the text below the form, you should refer to the SQLAlchemy documentation on
@@ -104,7 +103,7 @@ Aggregate functions are allowed and encouraged for metrics.
 
 You can also certify metrics if you'd like for your team in this view.
 
-2. Virtual calculated columns: you can write SQL queries that
+1. Virtual calculated columns: you can write SQL queries that
 customize the appearance and behavior
 of a specific column (e.g. `CAST(recovery_rate as float)`).
 Aggregate functions aren't allowed in calculated columns.
@@ -179,8 +178,8 @@ of other table configuration and visualization options, so please start explorin
 slices and dashboards of your own
 
 ֿ
-### Manage access to Dashboards
 
+### Manage access to Dashboards
 
 Access to dashboards is managed via owners (users that have edit permissions to the dashboard)
 
@@ -196,6 +195,7 @@ Non-owner users access can be managed two different ways:
 ### Customizing dashboard
 
 The following URL parameters can be used to modify how the dashboard is rendered:
+
 - `standalone`:
   - `0` (default): dashboard is displayed normally
   - `1`: Top Navigation is hidden

docs/docs/using-superset/exploring-data.mdx

@@ -13,7 +13,7 @@ In this tutorial, we will introduce key concepts in Apache Superset through the
 real dataset which contains the flights made by employees of a UK-based organization in 2011. The
 following information about each flight is given:
 
-- The traveller’s department. For the purposes of this tutorial the departments have been renamed
+- The traveler’s department. For the purposes of this tutorial the departments have been renamed
   Orange, Yellow and Purple.
 - The cost of the ticket.
 - The travel class (Economy, Premium Economy, Business and First Class).