fix(action): correct file path for task_mmu.c in action.yml

.github/actions/susfs/action.yml

@@ -143,7 +143,7 @@ runs:
           fi
         fi
 
-        cat /fs/proc/task_mmu.c
+        cat fs/proc/task_mmu.c
 
         patch -p1 < 50_add_susfs_in_gki-${{ inputs.android_version }}-${{ inputs.kernel_version }}.patch || true