Bump nrf firmware release version

Author: gemenerik

src/versions.json

@@ -1,7 +1,7 @@
 {
-  "crazyflie-release-version": "2025.02-rc3",
+  "crazyflie-release-version": "2025.02-rc4",
   "crazyflie-firmware-version": "2025.02-rc2",
-  "crazyflie2-nrf-firmware-version": "2025.02-rc1",
+  "crazyflie2-nrf-firmware-version": "2025.02-rc2",
   "lighthouse-fpga-version": "V6",
   "aideck-esp-firmware-version": "2025.02-rc2",
   "aideck-gap8-examples-version": "not_included",