west.yml : update modules/tee/tf-m/trusted-firmware-m

Takes the PR
zephyrproject-rtos/trusted-firmware-m#115
to fix the build error on stm32u5 due to gcc revision

Signed-off-by: Francois Ramu <francois.ramu@st.com>

west.yml

@@ -341,7 +341,7 @@ manifest:
       groups:
         - tee
     - name: trusted-firmware-m
-      revision: fa020a8b001843bb5a115bc4692eaf6787e3d1de
+      revision: pull/115/head
       path: modules/tee/tf-m/trusted-firmware-m
       groups:
         - tee