chore: sourceDescription typo and emphasis on MUST (OAI#234)

* Minor example updates from linter (OAI#215)

* Update ReadMe images (OAI#229)

* chore: fix double pipe rendering for respec

* chore: update images on the repo ReadMe

* chore: typo

closes OAI#233

---------

Co-authored-by: Lorna Jane Mitchell <[email protected]>
Co-authored-by: Frank Kilcommins <[email protected]>

versions/1.0.0.md

@@ -71,7 +71,7 @@ In order to preserve the ability to round-trip between YAML and JSON formats, YA
 
 It is RECOMMENDED that the entry Arazzo document be named: `arazzo.json` or `arazzo.yaml`.
 
-An Arazzo Description MAY be made up of a single document or be divided into multiple, connected parts at the discretion of the author. If workflows from other documents are being referenced, they must by included as a [Source Description Object](#source-description-object). In a multi-document description, the document containing the [Arazzo Specification Object](#arazzo-specification-object) is known as the **entry Arazzo document**. 
+An Arazzo Description MAY be made up of a single document or be divided into multiple, connected parts at the discretion of the author. If workflows from other documents are being referenced, they MUST be included as a [Source Description Object](#source-description-object). In a multi-document description, the document containing the [Arazzo Specification Object](#arazzo-specification-object) is known as the **entry Arazzo document**.
 
 ### Data Types