[Editorial] Regionid: covert the normative statements into bullet poi…

…nts (#625)

This PR is in alignment with Issue #606

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Co-authored-by: Irena Jurica <[email protected]>

specification/columns/regionid.md

@@ -2,7 +2,10 @@
 
 A Region ID is a provider-assigned identifier for an isolated geographic area where a [*resource*](#glossary:resource) is provisioned or a [*service*](#glossary:service) is provided. The region is commonly used for scenarios like analyzing cost and unit prices based on where *resources* are deployed.
 
-The RegionId column MUST be present in a [*FOCUS dataset*](#glossary:FOCUS-dataset) when the provider supports deploying resources or services within a *region* and MUST be of type String. RegionId MUST NOT be null when a *resource* or *service* is operated in or managed from a distinct region by the Provider and MAY contain null values when a *resource* or *service* is not restricted to an isolated geographic area.
+The RegionId column adheres to the following requirements:
+
+* The RegionId column MUST be present in a [*FOCUS dataset*](#glossary:FOCUS-dataset) when the provider supports deploying resources or services within a region and MUST be of type String.
+* RegionId MUST NOT be null when a *resource* or *service* is operated in or managed from a distinct region by the Provider and MAY contain null values when a *resource* or *service* is not restricted to an isolated geographic area.
 
 ## Column ID