[Bug] Fix compilation issue with Swap Hands and Encoder Map (#20348)

quantum/action.c

@@ -39,6 +39,10 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #    include "pointing_device.h"
 #endif
 
+#if defined(ENCODER_ENABLE) && defined(ENCODER_MAP_ENABLE) && defined(SWAP_HANDS_ENABLE)
+#    include "encoder.h"
+#endif
+
 int tp_buttons;
 
 #if defined(RETRO_TAPPING) || defined(RETRO_TAPPING_PER_KEY) || (defined(AUTO_SHIFT_ENABLE) && defined(RETRO_SHIFT))