MLECO-2036: Fix Vela3 documentation references & update Vela .ini configuration

Signed-off-by: George Gekov <george.gekov@arm.com>
Change-Id: I92b9ab60974ad266246994deae5833f7f374633d
diff --git a/scripts/vela/default_vela.ini b/scripts/vela/default_vela.ini
index c49b597..327b760 100644
--- a/scripts/vela/default_vela.ini
+++ b/scripts/vela/default_vela.ini
@@ -44,3 +44,4 @@
 const_mem_area=Axi1
 arena_mem_area=Axi0
 cache_mem_area=Axi0
+arena_cache_size=4194304
\ No newline at end of file