fix cp year in the spec document

Signed-off-by: Lukas Jungmann <lukas.jungmann@oracle.com>
diff --git a/spec/src/main/asciidoc/license-efsl.adoc b/spec/src/main/asciidoc/license-efsl.adoc
index 1ec9064..50fa197 100644
--- a/spec/src/main/asciidoc/license-efsl.adoc
+++ b/spec/src/main/asciidoc/license-efsl.adoc
@@ -13,7 +13,7 @@
 
 Release: {revdate}
 ....
-Copyright (c) 2021 Eclipse Foundation.
+Copyright (c) 2021, 2024 Eclipse Foundation.
 
 === Eclipse Foundation Specification License