west.yml: update Zephyr to 6cd7cfa104a

Total of 91 commits. Changes include:
6cd7cfa104a xtensa: mmu: ptables: Set PPN in region_map_update to fix
            memory mapping
942b1e85715 xtensa: mmu: ptables: Introduce PTE_PPN_SET macro
f5f56113fe2 xtensa: mmu: ptables: Introduce PTE_PPN_GET macro
53eaf0f71ee llext: llext_priv: INSTR_FETCHABLE missing parentheses in
            definition

Signed-off-by: Adrian Warecki <adrian.warecki@intel.com>

Author: softwarecki

west.yml

@@ -43,7 +43,7 @@ manifest:
 
     - name: zephyr
       repo-path: zephyr
-      revision: f908d0b5f22adaaf912e729317c323864f1e1641
+      revision: 6cd7cfa104a5f4de68408c9bf6516cd1109b9782
       remote: zephyrproject
 
       # Import some projects listed in zephyr/west.yml@revision