[asan] Fix typo
// || `[0x400000000000, 0x47ffffffffff]` || LowShadow ||
// || `[0x000000000000, 0x3fffffffffff]` || LowMem ||
//
-// Shadow mapping on NerBSD/i386 with SHADOW_OFFSET == 0x40000000:
+// Shadow mapping on NetBSD/i386 with SHADOW_OFFSET == 0x40000000:
// || `[0x60000000, 0xfffff000]` || HighMem ||
// || `[0x4c000000, 0x5fffffff]` || HighShadow ||
// || `[0x48000000, 0x4bffffff]` || ShadowGap ||
