Clarifiy Layered Standards (#778)

Author: chrbertsch

content/_index.html

@@ -121,7 +121,8 @@ <h1 class="mb-4">The leading standard to exchange dynamic simulation models</h1>
   <h2 class="display-5 mb-3 fw-semibold lh-sm">Layered Standards</h2>
 
   <p class="lead fw-normal">
-    The following <a href="https://fmi-standard.org/docs/3.0.2/#VersioningLayered">Layered Standards</a> based on FMI are currently under development.
+     <a href="https://fmi-standard.org/docs/3.0.2/#VersioningLayered">Layered Standards</a> define extensions of the FMI Standard and can be released by any organization.<br/>
+     The following Layered Standards are maintained by the FMI Project.
   </p>
 
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