DIR_METADATA: Use # instead of // for comments

Bug: crbug.com/1174699
Change-Id: Ia3129ced5da87a33c8bc80469f6cbc7abcccf90e
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/77830
Auto-Submit: Edward Lesmes <ehmaldonado@google.com>
Reviewed-by: Wei Li <weili@chromium.org>
Commit-Queue: Wei Li <weili@chromium.org>

third_party/base/allocator/partition_allocator/DIR_METADATA

diff --git a/third_party/base/allocator/partition_allocator/DIR_METADATA b/third_party/base/allocator/partition_allocator/DIR_METADATA
index 296c22b..97f4529 100644
--- a/third_party/base/allocator/partition_allocator/DIR_METADATA
+++ b/third_party/base/allocator/partition_allocator/DIR_METADATA
@@ -1,5 +1,5 @@
 monorail {
   component: "Blink>MemoryAllocator>Partition"
 }
-// Also: security-dev@chromium.org
+# Also: security-dev@chromium.org
 team_email: "platform-architecture-dev@chromium.org"