Correct typos in comments and documentation

Author: per1234

README.adoc

@@ -5,7 +5,7 @@
 
 image:https://github.com/{repository-owner}/{repository-name}/actions/workflows/spell-check.yml/badge.svg["Spell Check status", link="https://github.com/{repository-owner}/{repository-name}/actions/workflows/spell-check.yml"]
 
-This library allows an Arduino board with USB capabilities to act as a Keyboard.
+This library allows an Arduino board with USB capabilities to act as a keyboard.
 
 For more information about this library please visit us at
 https://www.arduino.cc/reference/en/language/functions/usb/keyboard/

examples/Serial/Serial.ino

@@ -16,7 +16,7 @@
 
   This example code is in the public domain.
 
-  http://www.arduino.cc/en/Tutorial/KeyboardSerial
+  https://www.arduino.cc/en/Tutorial/BuiltInExamples/KeyboardSerial
 */
 
 #include "Keyboard.h"

library.properties

@@ -2,7 +2,7 @@ name=Keyboard
 version=1.0.2
 author=Arduino
 maintainer=Arduino <[email protected]>
-sentence=Allows an Arduino/Genuino board with USB capabilites to act as a Keyboard.
+sentence=Allows an Arduino board with USB capabilities to act as a Keyboard.
 paragraph=This library plugs on the HID library. It can be used with or without other HID-based libraries (Mouse, Gamepad etc)
 category=Device Control
 url=https://www.arduino.cc/reference/en/language/functions/usb/keyboard/

src/Keyboard.cpp

@@ -335,4 +335,3 @@ size_t Keyboard_::write(const uint8_t *buffer, size_t size) {
 Keyboard_ Keyboard;
 
 #endif
-

src/Keyboard.h

@@ -84,7 +84,7 @@
 #define KEY_F24       0xFB
 
 
-//  Low level key report: up to 6 keys and shift, ctrl etc at once
+// Low level key report: up to 6 keys and shift, ctrl etc at once
 typedef struct
 {
   uint8_t modifiers;
@@ -111,4 +111,3 @@ extern Keyboard_ Keyboard;
 
 #endif
 #endif
-