meta-ampere: remove env call from service file

We are suppose to use direct executable calls in service files
rather than indirections through /bin/env (See Anti-patterns).

Tested:
- Check related services to work like before

Signed-off-by: Thang Q. Nguyen <thang@os.amperecomputing.com>
Change-Id: Idb494ce781fa1bdcac176cd89612e6016e6e04d9
diff --git a/meta-ampere/meta-jade/recipes-phosphor/gpio/phosphor-gpio-monitor/ampere_hightemp_start@.service b/meta-ampere/meta-jade/recipes-phosphor/gpio/phosphor-gpio-monitor/ampere_hightemp_start@.service
index 5f26194..ff11d6e 100644
--- a/meta-ampere/meta-jade/recipes-phosphor/gpio/phosphor-gpio-monitor/ampere_hightemp_start@.service
+++ b/meta-ampere/meta-jade/recipes-phosphor/gpio/phosphor-gpio-monitor/ampere_hightemp_start@.service
@@ -3,4 +3,4 @@
 
 [Service]
 Restart=no
-ExecStart=/usr/bin/env ampere_add_redfishevent.sh OpenBMC.0.1.AmpereEvent.Warning "CPU%i HighTemp asserted"
+ExecStart=/usr/sbin/ampere_add_redfishevent.sh OpenBMC.0.1.AmpereEvent.Warning "CPU%i HighTemp asserted"