doc/Doxyfile: update for 3.0.1

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
diff --git a/doc/Doxyfile b/doc/Doxyfile
index 07b4d1f..c001ef7 100644
--- a/doc/Doxyfile
+++ b/doc/Doxyfile
@@ -31,7 +31,7 @@
 # This could be handy for archiving the generated documentation or
 # if some version control system is used.
 
-PROJECT_NUMBER         = 3.0
+PROJECT_NUMBER         = 3.0.1
 
 # With the PROJECT_LOGO tag one can specify a logo or icon that is included
 # in the documentation. The maximum height of the logo should not exceed 55