Fix heading level for loongarch64 paging mode
diff --git a/PROTOCOL.md b/PROTOCOL.md
index 271c2239..daadb9e8 100644
--- a/PROTOCOL.md
+++ b/PROTOCOL.md
@@ -737,7 +737,7 @@ Values assignable to `mode`, `max_mode`, and `min_mode`:
#define LIMINE_PAGING_MODE_MIN LIMINE_PAGING_MODE_RISCV_SV39
```
-### loongarch64
+#### loongarch64
Values assignable to `mode`, `max_mode`, and `min_mode`:
```c
