Update FTL test devices

Author: sunmou99

scripts/gha/print_matrix_configuration.py

@@ -151,8 +151,8 @@
   "emulator_target": {"type": "virtual", "image":"system-images;android-28;google_apis;x86_64"},
   "emulator_latest": {"type": "virtual", "image":"system-images;android-29;default;x86"},
   "ios_min": {"type": "real", "model":"iphone8", "version":"11.4"},
-  "ios_target": {"type": "real", "model":"iphone6s", "version":"12.0"},
-  "ios_latest": {"type": "real", "model":"iphone11pro", "version":"14.1"},
+  "ios_target": {"type": "real", "model":"iphone8plus", "version":"12.0"},
+  "ios_latest": {"type": "real", "model":"iphone11", "version":"13.6"},
   "simulator_min": {"type": "virtual", "name":"iPhone 6", "version":"11.4"},
   "simulator_target": {"type": "virtual", "name":"iPhone 8", "version":"12.0"},
   "simulator_latest": {"type": "virtual", "name":"iPhone 11", "version":"14.4"},