formats: Spelling fixes

Correct typos of the following word families:

truncate

ASTERISK-29714

Change-Id: I6507760c72b919873cff7cac22b3781036cd4955

formats/format_ogg_speex.c

@@ -243,7 +243,7 @@ static struct ast_frame *ogg_speex_read(struct ast_filestream *fs,
 }
 
 /*!
- * \brief Trucate an OGG/Speex filestream.
+ * \brief Truncate an OGG/Speex filestream.
  * \param s The filestream to truncate.
  * \return 0 on success, -1 on failure.
  */

formats/format_ogg_vorbis.c

@@ -336,7 +336,7 @@ static struct ast_frame *ogg_vorbis_read(struct ast_filestream *fs,
 }
 
 /*!
- * \brief Trucate an OGG/Vorbis filestream.
+ * \brief Truncate an OGG/Vorbis filestream.
  * \param fs The filestream to truncate.
  * \return 0 on success, -1 on failure.
  */