fix(action): correct indentation in sed command for task_mmu.c modifications

.github/actions/susfs/action.yml

@@ -165,8 +165,8 @@ runs:
           sed -i '/int ret.*= 0, copied.*= 0;/{
           /int ret.*= 0, copied.*= 0;/!d
           a\
-              unsigned int nr_subpages = __PAGE_SIZE / PAGE_SIZE;\
-              pagemap_entry_t *res = NULL;
+                unsigned int nr_subpages = __PAGE_SIZE / PAGE_SIZE;\
+                pagemap_entry_t *res = NULL;
           }' fs/proc/task_mmu.c
         fi
         cat fs/proc/task_mmu.c