doc/APIchanges: Fix two hashes

Signed-off-by: James Almer <jamrial@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

doc/APIchanges

@@ -147,7 +147,7 @@ API changes, most recent first:
   Add AVFilterLink.channels, avfilter_link_get_channels()
   and avfilter_ref_get_channels().
 
-2012-12-15 - 2ada584d - lavc 54.80.100 - avcodec.h
+2012-12-15 - 96d815fc - lavc 54.80.100 - avcodec.h
   Add pkt_size field to AVFrame.
 
 2012-11-25 - c70ec631 - lavu 52.9.100 - opt.h
@@ -434,7 +434,7 @@ lavd 54.4.100 / 54.0.0, lavfi 3.5.0
 2012-07-29 - 7c26761 / 681ed00 - lavf 54.22.100 / 54.13.0 - avformat.h
   Add AVFMT_FLAG_NOBUFFER for low latency use cases.
 
-2012-07-10 - 5fade8a - lavu 51.37.0
+2012-07-10 - f3e5e6f - lavu 51.37.0
   Add av_malloc_array() and av_mallocz_array()
 
 2012-06-22 - e847f41 / d3d3a32 - lavu 51.61.100 / 51.34.0