Changelog: Update

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Changelog

@@ -2,6 +2,8 @@ Entries are sorted chronologically from oldest to youngest within each release,
 releases are sorted from youngest to oldest.
 
 version 3.0.12
+- avutil/integer: Fix integer overflow in av_mul_i()
+- avcodec/msrle: Check that the input is large enough to contain a end of picture code
 - avcodec/jpeg2000dec: Fix off by 1 error in JPEG2000_PGOD_CPRL handling
 - avcodec/mpeg4videodec: Fix typo in sprite delta check
 - avcodec/h264_cavlc: Check mb_skip_run