Docs: Add correct casing for API and ID to style guide (#19625)

contribute/style-guides/documentation-style-guide.md

@@ -56,7 +56,7 @@ For all items not covered in this guide, refer to the [Microsoft Style Guide](ht
 
 * Grafana, Loki, and Prometheus are always capitalized unless part of a code block.
 * Git is always capitalized, unless part of a code block.
-* Abbreviations are always capitalized (such as JSON, SQL, HTTP, or URL) unless they are part of a code block.
+* Abbreviations are always capitalized (such as API, HTTP, ID, JSON, SQL, or URL) unless they are part of a code block.
 
 ### Links and references