Update release number.

Author: tomkraljevic

ci/release.properties

@@ -9,14 +9,15 @@ BUILD_MAJOR_VERSION=2
 # Odd numbers are releases from master (a plain 'git clone').
 #
 # Release history:
-#     Lagrange: 2.6.0.x
-#     Kahan:    2.4.0.x
-#     Jacobi:   2.2.0.x
-#     Hilbert:  2.0.0.x
-#     Godel:    1.6.5.x
-#     Gauss:    1.6.3.x
+#     Mandelbrot:  2.8.0.x
+#     Lagrange:    2.6.0.x
+#     Kahan:       2.4.0.x
+#     Jacobi:      2.2.0.x
+#     Hilbert:     2.0.0.x
+#     Godel:       1.6.5.x
+#     Gauss:       1.6.3.x
 #
-BUILD_MINOR_VERSION=7
+BUILD_MINOR_VERSION=9
 
 BUILD_INCREMENTAL_VERSION=0