CI-CD Updates (#768)

* Use new version of CI-CD Actions
* Use cSpell spell check, and use ubuntu-20.04 for formatting check
* Format and spell check all files in the portable directory
* Remove the https:// from #errors and #warnings as uncrustify attempts to change it to /*
* Use checkout@v3 instead of checkout@v2 on all jobs
---------

portable/MemMang/heap_5.c

@@ -28,7 +28,7 @@
 
 /*
  * A sample implementation of pvPortMalloc() that allows the heap to be defined
- * across multiple non-contigous blocks and combines (coalescences) adjacent
+ * across multiple non-contiguous blocks and combines (coalescences) adjacent
  * memory blocks as they are freed.
  *
  * See heap_1.c, heap_2.c, heap_3.c and heap_4.c for alternative