Revert to version of image with 8 rather than 9

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc8.5.x/trunk@1735437 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/res/side_left.bmp b/res/side_left.bmp
index c57c600..1f0a774 100644
--- a/res/side_left.bmp
+++ b/res/side_left.bmp
Binary files differ