Fix a typo.

Thanks to e98 for the report.

include/opusfile.h

@@ -1353,7 +1353,7 @@ int op_pcm_seek(OggOpusFile *_of,ogg_int64_t _pcm_offset) OP_ARG_NONNULL(1);
                           channel ordering</a>.
                          This must have room for at least \a _buf_size values.
    \param      _buf_size The number of values that can be stored in \a _pcm.
-                         It is reccommended that this be large enough for at
+                         It is recommended that this be large enough for at
                           least 120 ms of data at 48 kHz per channel (5760
                           values per channel).
                          Smaller buffers will simply return less data, possibly
@@ -1435,7 +1435,7 @@ OP_WARN_UNUSED_RESULT int op_read(OggOpusFile *_of,
                           channel ordering</a>.
                          This must have room for at least \a _buf_size floats.
    \param      _buf_size The number of floats that can be stored in \a _pcm.
-                         It is reccommended that this be large enough for at
+                         It is recommended that this be large enough for at
                           least 120 ms of data at 48 kHz per channel (5760
                           samples per channel).
                          Smaller buffers will simply return less data, possibly
@@ -1503,7 +1503,7 @@ OP_WARN_UNUSED_RESULT int op_read_float(OggOpusFile *_of,
                           buffer.
                          This must have room for at least \a _buf_size values.
    \param      _buf_size The number of values that can be stored in \a _pcm.
-                         It is reccommended that this be large enough for at
+                         It is recommended that this be large enough for at
                           least 120 ms of data at 48 kHz per channel (11520
                           values total).
                          Smaller buffers will simply return less data, possibly
@@ -1564,7 +1564,7 @@ OP_WARN_UNUSED_RESULT int op_read_stereo(OggOpusFile *_of,
                           buffer.
                          This must have room for at least \a _buf_size values.
    \param      _buf_size The number of values that can be stored in \a _pcm.
-                         It is reccommended that this be large enough for at
+                         It is recommended that this be large enough for at
                           least 120 ms of data at 48 kHz per channel (11520
                           values total).
                          Smaller buffers will simply return less data, possibly