add bme688 example to smoketest

Author: Al Hoang

smoketest.sh

@@ -167,3 +167,4 @@ tinygo build -size short -o ./build/test.hex -target=wioterminal -stack-size 8kb
 # network examples (comboat)
 tinygo build -size short -o ./build/test.hex -target=elecrow-rp2040 -stack-size 8kb ./examples/net/tlsclient/
 tinygo build -size short -o ./build/test.hex -target=elecrow-rp2350 -stack-size 8kb ./examples/net/ntpclient/
+tinygo build -size short -o ./build/test.hex -target=pico ./examples/bme688