change(core): Updated at core version to a182b1a4

- fix(mqtt): Fixed an issue where sending `AT+MQTTCLEAN` after an `AT+MQTTCONN` timeout would cause a crash.

Author: ustccw

components/at/lib/VERSION

@@ -1,7 +1,7 @@
-ESP32:   579a87b
-ESP32C3: 579a87b
-ESP32C2: 579a87b
-ESP32C5: 579a87b
-ESP32C6: 579a87b
-ESP32C61:579a87b
-ESP32S2: 579a87b
+ESP32:   a182b1a
+ESP32C3: a182b1a
+ESP32C2: a182b1a
+ESP32C5: a182b1a
+ESP32C6: a182b1a
+ESP32C61:a182b1a
+ESP32S2: a182b1a