Partial: Better error name

Author: lamATnginx

layouts/partials/get-feature-flags.html

@@ -2,7 +2,7 @@
 {{- $featureName := . | default false -}}
 {{- $featureFlags := site.Params.featureflags -}}
 {{- if ne (printf "%T" (index $featureFlags $featureName)) "bool" -}}
-  {{ errorf "Expected type of feature flag params to be boolean." }}
+  {{ errorf "Expected type of feature flag param %s to be boolean." $featureName }}
 {{- end -}}
 {{- $param := index $featureFlags $featureName -}}
 {{- $result := false -}}