doc/bitstream_filters: Fix project name after merge

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

doc/bitstream_filters.texi

@@ -81,7 +81,7 @@ Extract the in-band extradata.
 Certain codecs allow the long-term headers (e.g. MPEG-2 sequence headers,
 or H.264/HEVC (VPS/)SPS/PPS) to be transmitted either "in-band" (i.e. as a part
 of the bitstream containing the coded frames) or "out of band" (e.g. on the
-container level). This latter form is called "extradata" in Libav terminology.
+container level). This latter form is called "extradata" in FFmpeg terminology.
 
 This bitstream filter detects the in-band headers and makes them available as
 extradata.