[PATCH] erofs-utils: README: update known-issue status of lz4hc

[Gao Xiang]

Known issue of LZ4_compress_HC_destSize() mentioned in README
was targeted by lz4 upstream days ago.

Update README so all users can be noticed.

Signed-off-by: Gao Xiang <hsiangkao at aol.com>
---
 README | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/README b/README
index 60b8eed6c1d3..5addd6b80e04 100644
--- a/README
+++ b/README
@@ -78,6 +78,11 @@ Known issues
    LZ4_compress_HC_destSize()
    https://github.com/lz4/lz4/issues/784
 
+   which has been resolved in
+   https://github.com/lz4/lz4/commit/e7fe105ac6ed02019d34731d2ba3aceb11b51bb1
+
+   and will be included in lz4-1.9.3 if all goes well.
+
 Obsoleted erofs.mkfs
 ~~~~~~~~~~~~~~~~~~~~
 
-- 
2.24.0