wifi_prov_mgr: increase firmware partition size

For ESP32-C3, firmware with Bluedroid host stack exceeds by ~20KB over default
allocated partition size.

examples/provisioning/wifi_prov_mgr/partitions.csv

@@ -2,4 +2,4 @@
 # Note: if you have increased the bootloader size, make sure to update the offsets to avoid overlap
 nvs,      data, nvs,     0x9000,  0x6000,
 phy_init, data, phy,     0xf000,  0x1000,
-factory,  app,  factory, 0x10000, 1200000,
+factory,  app,  factory, 0x10000, 1300000,