Fix missing word in keywords.txt

Line 2 in keywords.txt file in the SPI and HID library directories have been modified as follows to ensure uniformity wrt the format in other libraries -

In ArduinoCore-avr\libraries\SPI\keywords.txt
Syntax Coloring Map SPI --> # Syntax Coloring Map For SPI

In ArduinoCore-avr\libraries\HID\keywords.txt
Syntax Coloring Map HID --> # Syntax Coloring Map For HID

Fixes arduino/Arduino#10938

libraries/HID/keywords.txt

 #######################################
-# Syntax Coloring Map HID
+# Syntax Coloring Map For HID
 #######################################
 
 #######################################

libraries/SPI/keywords.txt

 #######################################
-# Syntax Coloring Map SPI
+# Syntax Coloring Map For SPI
 #######################################
 
 #######################################