Fix aviation 8.33kHz step size to reduce frequency drift (#2950)

Update aviation radio step size from 8330 Hz to 8333 Hz in freqman_steps
and freqman_steps_short arrays. This better represents the actual 8⅓ kHz
(25000/3 Hz) aviation channel spacing and significantly reduces frequency
drift during dial tuning.
With this fix, stepping 24 times from 123.000 MHz now correctly reaches
123.200 MHz instead of 123.199 MHz.

firmware/application/freqman_db.cpp

@@ -122,7 +122,7 @@ options_t freqman_steps = {
     {"1kHz        ", 1000},
     {"5kHz (SA AM)", 5000},
     {"6.25kHz(NFM)", 6250},
-    {"8.33kHz(AIR)", 8330},
+    {"8.33kHz(AIR)", 8333},
     {"9kHz (EU AM)", 9000},
     {"10kHz(US AM)", 10000},
     {"12.5kHz(NFM)", 12500},
@@ -144,7 +144,7 @@ options_t freqman_steps_short = {
     {"1kHz", 1000},
     {"5kHz", 5000},
     {"6.25kHz", 6250},
-    {"8.33kHz", 8330},
+    {"8.33kHz", 8333},
     {"9kHz", 9000},
     {"10kHz", 10000},
     {"12.5kHz", 12500},