fix(i18n/ar): update Reading Time localization for Arabic language (#527)

* update the localization based on Arabic syntax

readingTime variable updated to match the exact syntax for Arabic language

One variable in Arabic no need to add the count variable for 1 minute, there is a word to describe that specifically. 
Other variable localization updated to match Arabic grammar tenses.

* remove unnecessary leading space

Co-authored-by: Jimmy Cai <github@jimmycai.com>

i18n/ar.yaml

@@ -30,8 +30,8 @@ article:
         other: التعديل الاخير
 
     readingTime:
-        one: "قرائة {{ .Count }} دقيقة"
+        one: "تُقرأ خلال دقيقة"
-        other: "قرائة {{ .Count }} دقائق"
+        other: "تُقرأ خلال {{ .Count }} دقائق"
 
 notFound:
     title: