Add translation for toc title

i18n/en.toml

@@ -17,6 +17,9 @@ other = "Archives"
 [wordCount]
 other = "{{ .WordCount }} Words"
 
+[tableOfContents]
+other = "Table of Contents"
+
 [newer]
 other = "Newer"
 

i18n/zh-hans.toml

@@ -17,6 +17,9 @@ other = "归档"
 [wordCount]
 other = "{{ .WordCount }} 字"
 
+[tableOfContents]
+other = "目录"
+
 [newer]
 other = "新"