Fix release notes suffix
diff --git a/build.gradle b/build.gradle
index 58bf125..60577de 100644
--- a/build.gradle
+++ b/build.gradle
@@ -212,7 +212,7 @@
         from (rootDir) {
             include "README.md"
             include "DISCLAIMER"
-            include "RELEASE_NOTES.txt"
+            include "RELEASE_NOTES.html"
             include "gradlew"
             include "gradle.bat"
             include "s4"