Update ACL pin to 3b5981ce898569aafa98abdf220c73f1a80685b9

Signed-off-by: Nikhil Raj <nikhil.raj@arm.com>
Change-Id: Ie82f312cd09ece61c3e5c11b653b9a7511f23620
diff --git a/scripts/get_compute_library.sh b/scripts/get_compute_library.sh
index 7d3f729..8f05e29 100755
--- a/scripts/get_compute_library.sh
+++ b/scripts/get_compute_library.sh
@@ -10,7 +10,7 @@
 #DEFAULT_CLFRAMEWORKREVISION="branches/arm_compute_21_02" # Release 21.02
 #
 # For pinning to a revision use this:
-DEFAULT_CLFRAMEWORKREVISION="c5b1beec99d2be7ff3babbc6345b1baa81f29eb7" #Correct Copyright dates
+DEFAULT_CLFRAMEWORKREVISION="3b5981ce898569aafa98abdf220c73f1a80685b9" #Implement Fanout mode in CPPScheduler
 
 usage() {
     echo "Usage: $CMD (Use the default clframework SHA)"