Update word list (aws#120)

* Add new common words to the cSpellWordList.txt

.github/.cSpellWords.txt

@@ -1,25 +1,49 @@
+abcdefghijklmno
+acceptedklmno
+cbmc
 CBMC
+cbor
 CBOR
-CMOCK
-CMock
+cmock
 Cmock
+CMock
+CMOCK
+coremqtt
+coverity
 Coverity
+CSDK
+ctest
 DCMOCK
 DDisable
+decihours
+Decihours
+DECIHOURS
 DNDEBUG
 DUNITY
-MISRA
-MQTT
-Misra
-Wunused
-abcdefghijklmno
-acceptedklmno
-cbmc
-cbor
-cmock
-coverity
-ctest
+getpacketid
+isystem
 lcov
 misra
+Misra
+MISRA
+MQTT
+mypy
+nondet
+Nondet
+NONDET
+pylint
+pytest
+pyyaml
 sinclude
+UNACKED
+unpadded
+Unpadded
+UNPADDED
+UNSUB
+UNSUBACK
+unsubscriptions
 utest
+vect
+Vect
+VECT
+Wunused