ob_gen: Switch from yq to jq

yq is better maintained and more versatile,
but less readily available on Linux systems,
and as we need very basic functionality only anyway,
jq should be fine.

ob_gen

@@ -15,7 +15,7 @@ SCRIPT_PATH="$(readlink -f "${BASH_SOURCE[0]}")"
 SCRIPT_DIR="$(dirname "$SCRIPT_PATH")"
 SCRIPT_NAME="$(basename "$SCRIPT_PATH")"
 OUT_DIR_DEFAULT="build"
-REQUIRED_TOOLS=("yq" "bc" "sed" "awk" "repvar" "obadgen" "openssl")
+REQUIRED_TOOLS=("jq" "bc" "sed" "awk" "repvar" "obadgen" "openssl")
 
 # parameters
 # repo="$(pwd)"
@@ -136,8 +136,8 @@ wget \
     -O "$OSH_TOOL_REPORT_JSON" \
     "$OSH_TOOL_REPORT_JSON_URL"
 COMPLIANCE_FACTOR_MIN="0.8"
-COMPLIANCE_FACTOR="$(yq r "$OSH_TOOL_REPORT_JSON" 'stats.ratings.compliance.factor')"
-COMPLIANCE_BADGE_URL=$(yq r "$OSH_TOOL_REPORT_JSON" 'stats.ratings.compliance.badgeUrl')
+COMPLIANCE_FACTOR="$(jq '.stats.ratings.compliance.factor' < "$OSH_TOOL_REPORT_JSON")"
+COMPLIANCE_BADGE_URL=$(jq '.stats.ratings.compliance.badgeUrl' < "$OSH_TOOL_REPORT_JSON")
 COMPLIANCE_BADGE="$out_dir/compliance-badge-raw.svg"
 wget \
 	--quiet \
@@ -174,7 +174,7 @@ EVIDENCE_2='"'"$OSH_TOOL_REPORT_HTML_URL"'"'
 EVIDENCE_3='"'"$OSH_TOOL_REPORT_MD_URL"'"'
 DATE_ISSUED_ON="$(date --iso-8601=seconds)"
 DATE_EXPIRES="$(date --iso-8601=seconds --date="2099-12-30")"
-COMPLIANCE_PERCENT="$(yq r "$OSH_TOOL_REPORT_JSON" 'stats.ratings.compliance.percent')"
+COMPLIANCE_PERCENT="$(jq '.stats.ratings.compliance.percent' < "$OSH_TOOL_REPORT_JSON")"
 EOF
 #EVIDENCE_4="{ \"compliance-factor\": \"$COMPLIANCE_FACTOR\" }"