memfault: upgrade to 1.30.3

Release notes here:

https://github.com/memfault/memfault-firmware-sdk/releases/tag/1.30.3

Notably, fixes an issue that prevents coredump saving on certain setups.

Signed-off-by: Noah Pendleton <[email protected]>

Author: noahp

west.yml

@@ -245,7 +245,7 @@ manifest:
       remote: throwtheswitch
     - name: memfault-firmware-sdk
       path: modules/lib/memfault-firmware-sdk
-      revision: 1.30.2
+      revision: 1.30.3
       remote: memfault
     - name: bsim
       repo-path: bsim_west