op-build v2.0-rc1 release notes

Signed-off-by: Stewart Smith <stewart@linux.ibm.com>
diff --git a/doc/release-notes/index.rst b/doc/release-notes/index.rst
index 7de1bce..bf640ee 100644
--- a/doc/release-notes/index.rst
+++ b/doc/release-notes/index.rst
@@ -13,3 +13,4 @@
    v1.21.2
    v1.22-rc1
    v1.22
+   v2.0-rc1