More spelling fixes that I introduced...

Author: joeybab3

libraries/Preferences/examples/StartCounter/StartCounter.ino

@@ -2,7 +2,7 @@
  ESP32 startup counter example with Preferences library.
 
  This simple example demonstrates using the Preferences library to store how many times
- the ESP32 module has booted. the Preferences library is a wrapper around the Non-volatile
+ the ESP32 module has booted. The Preferences library is a wrapper around the Non-volatile
  storage on ESP32 processor.
 
  created for arduino-esp32 09 Feb 2017
@@ -29,7 +29,7 @@ void setup() {
   // Or remove the counter key only
   //preferences.remove("counter");
 
-  // Get the counter value, if the key doess not exist, return a default value of 0
+  // Get the counter value, if the key does not exist, return a default value of 0
   // Note: Key name is limited to 15 chars.
   unsigned int counter = preferences.getUInt("counter", 0);