Add 4.0 content to Specification appendix

jaxrs-spec/src/main/asciidoc/chapters/appendix/_changes-since-3.1-release.adoc

diff --git a/jaxrs-spec/src/main/asciidoc/chapters/appendix/_changes-since-3.1-release.adoc b/jaxrs-spec/src/main/asciidoc/chapters/appendix/_changes-since-3.1-release.adoc
index 9c7e1ae..c981939 100644
--- a/jaxrs-spec/src/main/asciidoc/chapters/appendix/_changes-since-3.1-release.adoc
+++ b/jaxrs-spec/src/main/asciidoc/chapters/appendix/_changes-since-3.1-release.adoc
@@ -14,4 +14,9 @@
 * <<javaee>>: Removal of `@ManagedBean`
 annotation support.  Managed bean support is now part of CDI.
 * <<java-se>>: Clarified when the two alternative ways of publishing on 
-Java SE must be supported.
\ No newline at end of file
+Java SE must be supported.
+* Removed `Link.JaxbLink` and `Link.JaxbAdapter` inner classes.
+* Added `getHeaderString()` method to `ClientRequestContext`, `ClientResponseContext`,
+`ContainerRequestContext`, `ContainerResponseContext`, and `HttpHeaders`.
+* Added `APPLICATION_MERGE_PATCH_JSON` to `MediaType`
+* Added `getMatchedResourceTemplates()` method to `UriInfo`.
\ No newline at end of file