chore: Update coverage.sh (openobserve#7006)

Author: oasisk

coverage.sh

@@ -3,9 +3,9 @@ set -eu -o pipefail
 # set -x
 export PS4='+ [${BASH_SOURCE[0]##*/}:${LINENO}${FUNCNAME[0]:+:${FUNCNAME[0]}}] '
 
-export COVERAGE_FUNCTIONS=${COVERAGE_FUNCTIONS:-30}
-export COVERAGE_LINES=${COVERAGE_LINES:-30}
-export COVERAGE_REGIONS=${COVERAGE_REGIONS:-19}
+export COVERAGE_FUNCTIONS=${COVERAGE_FUNCTIONS:-42}
+export COVERAGE_LINES=${COVERAGE_LINES:-42}
+export COVERAGE_REGIONS=${COVERAGE_REGIONS:-32}
 
 usage() {
     cat <<EOF