目录优化

app/public/book_tag/tag_list.json

@@ -6,11 +6,11 @@
 	"aṭṭhakathā": { "level": 0 },
 	"ṭīkā": { "level": 0 },
 	"añña": { "level": 0 },
-	"dīghanikāya": { "level": 1 },
-	"majjhimanikāya": { "level": 1 },
-	"saṃyuttanikāya": { "level": 1 },
-	"aṅguttaranikāya": { "level": 1 },
-	"khuddakanikāya": { "level": 1 },
+	"dīgha": { "level": 1 },
+	"majjhima": { "level": 1 },
+	"saṃyutta": { "level": 1 },
+	"aṅguttara": { "level": 1 },
+	"khuddaka": { "level": 1 },
 	"pārājikapāḷi": { "level": 1 },
 	"pācittiyapāḷi": { "level": 1 },
 	"mahāvagga": { "level": 1 },