manifest: Update sdk-zephyr and memfault-firmware-sdk

Manifest PR for nrfconnect/sdk-zephyr#3513
Manifest PR for memfault/memfault-firmware-sdk#97

Signed-off-by: Timothy Keys <timothy.keys@nordicsemi.no>

Author: weeTike

west.yml

@@ -64,7 +64,7 @@ manifest:
     # https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/guides/modules.html
     - name: zephyr
       repo-path: sdk-zephyr
-      revision: 0985cced399a26c994a0736ba8c00dc852e22ec3
+      revision: pull/3513/head
       import:
         # In addition to the zephyr repository itself, NCS also
         # imports the contents of zephyr/west.yml at the above
@@ -244,7 +244,7 @@ manifest:
       remote: throwtheswitch
     - name: memfault-firmware-sdk
       path: modules/lib/memfault-firmware-sdk
-      revision: 1.30.3
+      revision: pull/97/head
       remote: memfault
     - name: bsim
       repo-path: bsim_west