version: Fix two more typos

Same as cafba99b51 but applied to
lavf and lavu.

libavformat/version.h

@@ -48,9 +48,9 @@
  * 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_LAVF_BITEXACT

libavutil/version.h

@@ -77,9 +77,9 @@
  * 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.
  *
  * @{
  */