pxt-microbit Accessibility PR (#529)

* Accessibility changes

docs/lessons/bop-it/activity.md

@@ -34,7 +34,7 @@ input.onButtonPressed(Button.B, () => {
 }) 
 ```
 
-### Challenge 1
+## Challenge 1
 
 Now let's add some more types of instructions for the player to follow. Let's add `PRESS PIN 0`. 
 Change the global variable `action` to `math->random(4)` so that we can add a new **IF** statement that checks if `action=3`. If it does, display instructions to press pin 0.
@@ -58,7 +58,7 @@ export function newAction() {
 }
 ```
 
-### Challenge 2
+## Challenge 2
 
 Now let's implement `PRESS PIN 0` in the main. Create a condition of `input->on pin pressed("P0")` that will add one to the score and calls the method `new action`.
 
@@ -80,7 +80,7 @@ input.onPinPressed(TouchPin.P0, () => {
 })
 ```
 
-### Challenge 3
+## Challenge 3
 
 Add `POINT ME NORTH` to the list of possible commands.
 

docs/lessons/bop-it/quiz.md

@@ -10,29 +10,29 @@ Use this activity document to guide your work in the [bop it activity](/lessons/
 
 Answer the questions while completing the tutorial. Pay attention to the dialogues!
 
-### 1. Write the code that will store the global variable named 'action' and returns a random number between 0 and 2
+## 1. Write the code that will store the global variable named 'action' and returns a random number between 0 and 2
 
 <br/>
 
-### 2. Write the code that will display the string, "PUSH A" if the global variable called 'action' is equal to 0
+## 2. Write the code that will display the string, "PUSH A" if the global variable called 'action' is equal to 0
 
 <br />
 
-### 3. Write the code that increments the score if button A is pressed when the global variable called 'action' is equal to 1
+## 3. Write the code that increments the score if button A is pressed when the global variable called 'action' is equal to 1
 
 <br />
 
-### 4. Write the code that will display the string "LOGO DOWN" if the global variable called 'action' is equal to 1
+## 4. Write the code that will display the string "LOGO DOWN" if the global variable called 'action' is equal to 1
 
 <br />
 
-### 5. Write the code that increments the score if the @boardname@ logo is tilted down when the global variable called 'action' is equal to 1
+## 5. Write the code that increments the score if the @boardname@ logo is tilted down when the global variable called 'action' is equal to 1
 
 <br />
 
-### 6. Write the code that will display the string "SHAKE" if the global variable called 'action' is equal to 2
+## 6. Write the code that will display the string "SHAKE" if the global variable called 'action' is equal to 2
 
 <br />
 
-### 7. Write the code that increments the score if the @boardname@ is shaken when the global variable called 'action' is equal to 2
+## 7. Write the code that increments the score if the @boardname@ is shaken when the global variable called 'action' is equal to 2