Docsfix2 (#510)

* missing packages

* fixing snippet issues

* snippet fix

* more doc fixes

docs/projects/hot-or-cold.md

@@ -163,3 +163,7 @@ input.onButtonPressed(Button.A, () => {
 })
 radio.setGroup(1)
 ```
+
+```package
+radio
+```

docs/projects/plant-watering.md

@@ -31,7 +31,6 @@ This is a follow up of the **[soil moisture project](/projects/soil-moisture)**.
 
 * [Make](/projects/plant-watering/make)  
 * [Code](/projects/plant-watering/code)
-* [Connect](/projects/plant-watering/connect)
 
 ### ~button /projects/plant-watering/make
 

docs/projects/plant-watering/code.md

@@ -57,3 +57,7 @@ basic.forever(() => {
 ```
 
 https://youtu.be/7eC_VjH1eP0
+
+```package
+radio
+```

docs/projects/voting-machine.md

@@ -74,3 +74,7 @@ and uses the number received as the brightness of the LED.
 
 When a message hasn't been received by a board for some time, it's pixel will start to blink. After more time, it will simply turn off. 
 
+
+```package
+radio
+```