bump latest OpenWRT version to 21.02-rc2

configs/common

@@ -8,7 +8,7 @@
 # Latest point release of each main release
 RELEASE_18_06="18.06.9"
 RELEASE_19_07="19.07.7"
-RELEASE_21_02="21.02.0-rc1"
+RELEASE_21_02="21.02.0-rc2"
 
 # Popular Luci apps
 # This list is probably only valid for the 21.02 release

configs/rpi-4

@@ -8,7 +8,7 @@ TARGET=bcm27xx/bcm2711
 # Currently there is only the "rpi-4" build profile for this TARGET
 PROFILE="rpi-4"
 
-RELEASE="21.02.0-rc1"
+RELEASE=${RELEASE_21_02}
 
 # See https://openwrt.org/packages/start
 #