Change expression to structure in intro.

Co-authored-by: Pierre-Antoine Champin <[email protected]>

Author: BigBlueHat

2024/json-ld-wg/index.html

@@ -152,7 +152,7 @@ <h2>Motivation and Background</h2>
           Internet of Things data (Web of Things Description), Verifiable Credentials, and Software Bill of Materials (SPDX).
         </p>
         <p>This growth in the applied use of JSON-LD has resulted in community interest in additional expressions of
-          JSON-LD's underlying Linked Data expression into other formats. YAML-LD has been created by the
+          JSON-LD's underlying Linked Data structure into other formats. YAML-LD has been created by the
           <a href="https://www.w3.org/community/json-ld/">JSON for Linking Data Community Group</a> for easing human
           authoring and providing a clearer path for using Linked Data applied to popular YAML-based documents such as
           infrastructure as code, static site front matter, and API documentation formats. Additionally, a need has