Update version for v2.6.0-rc1 release

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/VERSION b/VERSION
index b042f94eba..e710b3f780 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.5.90
+2.5.91