Replace discoverable by searchable for STAC-FastAPI high-level text

Author: zacdezgeo

docs/src/overrides/home.html

@@ -125,7 +125,7 @@ <h5>
                         <img src="../img/stacfastapi_logo.png" alt="stac-fastapi logo" loading="lazy" />
                         <div class="feature-item__description md-typeset">
                             <h3>
-                                Make it Discoverable
+                                Make it Searchable
                             </h3>
                             <h5>
                                 stac-fastapi - REST API Service