Update ACL pin to 840a72cc745c60eccbd26fe192b035ec68b2ee41

* Change tensor to non const to fix build error caused by ACL fix for QLSTM

Signed-off-by: Nikhil Raj <nikhil.raj@arm.com>
Change-Id: I7ab0f644dfb3cb3cf21bda73028e9368f3354f4a
diff --git a/scripts/get_compute_library.sh b/scripts/get_compute_library.sh
index 78b5d22..51be4ee 100755
--- a/scripts/get_compute_library.sh
+++ b/scripts/get_compute_library.sh
@@ -10,7 +10,7 @@
 #DEFAULT_CLFRAMEWORKREVISION="branches/arm_compute_20_08" # Release 20.08
 #
 # For pinning to a revision use this:
-DEFAULT_CLFRAMEWORKREVISION="1643a45557fde79ee209f55c507860307ffe627c" #COMPMID-3760: Reduce template instantiations for ROIAlign reference.
+DEFAULT_CLFRAMEWORKREVISION="840a72cc745c60eccbd26fe192b035ec68b2ee41" #COMPMID-3773: Fix the accumulation of projection in QLSTM.
 
 usage() {
     echo "Usage: $CMD (Use the default clframework SHA)"