Add empty release note for 1.3.1
diff --git a/src/site/markdown/release-notes/1.3.1.md b/src/site/markdown/release-notes/1.3.1.md
new file mode 100644
index 0000000..94fa1b1
--- /dev/null
+++ b/src/site/markdown/release-notes/1.3.1.md
@@ -0,0 +1,2 @@
+Apache Axiom 1.3.1 Release Note
+===============================