Fix bash regex style (#52)

* Fix bash regex style

* Update rootfs/etc/cont-init.d/pulse-config.sh

Co-authored-by: Franck Nijhof <git@frenck.dev>

* Update pulse-config.sh

Co-authored-by: Franck Nijhof <git@frenck.dev>

Author: pvizeli

rootfs/etc/cont-init.d/pulse-config.sh

@@ -6,7 +6,7 @@ declare tsched
 readonly ALSA_CARDS="$(aplay -l)"
 
 # RaspberryPi
-if echo "${ALSA_CARDS}" | grep -q "\[bcm2835 .*\]"; then
+if [[ "${ALSA_CARDS}" =~ \[bcm2835.*?\] ]]; then
     bashio::log.info "Found RaspberryPi system"
     tsched=false
 else