release: prepare source release apache-kvrocks-2.13.0
diff --git a/src/VERSION.txt b/src/VERSION.txt
index 76cff7f..a3ebb9f 100644
--- a/src/VERSION.txt
+++ b/src/VERSION.txt
@@ -1 +1 @@
-unstable
\ No newline at end of file
+2.13.0
\ No newline at end of file