Fix string formatting for thermal throttling warnings in LED deck examples

Interestingly this was not caught by pre-commit on Python 3.13

Author: gemenerik

examples/color_led_deck/color_led_cycle.py

@@ -77,7 +77,7 @@ def thermal_status_callback(timestamp, data, logconf):
             throttle_pct = data['hprgbw.throttlePct']
             if throttle_pct > 0:
                 temp = data['hprgbw.deckTemp']
-                print(f"WARNING: Thermal throttling active! Temp: {temp}°C, Throttle: {throttle_pct}%")
+                print(f'WARNING: Thermal throttling active! Temp: {temp}°C, Throttle: {throttle_pct}%')
 
         # Setup log configuration for thermal monitoring
         log_conf = LogConfig(name='ThermalStatus', period_in_ms=100)

examples/color_led_deck/color_led_set.py

@@ -43,7 +43,7 @@ def thermal_status_callback(timestamp, data, logconf):
             throttle_pct = data['colorled.throttlePct']
             if throttle_pct > 0:
                 temp = data['colorled.deckTemp']
-                print(f"WARNING: Thermal throttling active! Temp: {temp}°C, Throttle: {throttle_pct}%")
+                print(f'WARNING: Thermal throttling active! Temp: {temp}°C, Throttle: {throttle_pct}%')
 
         # Setup log configuration for thermal monitoring
         log_conf = LogConfig(name='ThermalStatus', period_in_ms=100)
@@ -78,7 +78,7 @@ def thermal_status_callback(timestamp, data, logconf):
             color_uint32 = pack_rgbw(color)
             cf.param.set_value('colorled.rgbw8888', color_uint32)
             time.sleep(0.01)
-            print(f"Setting LED to R={color.r}, G={color.g}, B={color.b}, W={color.w}")
+            print(f'Setting LED to R={color.r}, G={color.g}, B={color.b}, W={color.w}')
             print('Press Ctrl-C to turn off LED and exit.')
             while True:
                 time.sleep(0.1)