avcodec/version: fix 2 recently introduced typo

libavcodec/version.h

@@ -47,9 +47,9 @@
  * dropped at a future version bump. The defines themselves are not part of
  * the public API and may change, break or disappear at any time.
  *
- * @note, when bumping the major version it is recommandeded to manually
+ * @note, when bumping the major version it is recommended to manually
  * disable each FF_API_* in its own commit instead of disabling them all
- * at once through the bump. This improves the git bissect-ability of the change.
+ * at once through the bump. This improves the git bisect-ability of the change.
  */
 
 #ifndef FF_API_VIMA_DECODER