tools/ci.sh: Build zephyr nucleo_wb55rg to test zephyr bluetooth build.

And eliminate one build to reduce CI time.
Signed-off-by: Damien George <damien@micropython.org>

tools/ci.sh

@@ -627,9 +627,8 @@ function ci_zephyr_install {
 
 function ci_zephyr_build {
     docker exec zephyr-ci west build -p auto -b qemu_x86 -- -DCONF_FILE=prj_minimal.conf
-    docker exec zephyr-ci west build -p auto -b frdm_k64f -- -DCONF_FILE=prj_minimal.conf
     docker exec zephyr-ci west build -p auto -b qemu_x86
     docker exec zephyr-ci west build -p auto -b frdm_k64f
     docker exec zephyr-ci west build -p auto -b mimxrt1050_evk
-    docker exec zephyr-ci west build -p auto -b reel_board
+    docker exec zephyr-ci west build -p auto -b nucleo_wb55rg # for bluetooth
 }