chore: Add principles for English titles and change all English titles

CONTRIBUTING.md

@@ -136,8 +136,8 @@ Look at [these files](https://docs.google.com/document/d/1QrDFcIiPjSLDn3EL15IJyg
 
 We follow the normal principles of English articles when translating, however, due to there're some special principles of titles, we should follow these rules:
 
-- For nouns, verbs, pronouns, adjectives and adverbs, capitalize the first character. For prepsitions, articles, conjections, interjections and auxiliary words, the first character should be in the lower case. *But we MUST make any word's first character in the upper case when it's at the beginning or in the end of the title, no matter what word it is*.
-- For proper nouns such as the direct reference of some variable or the name of some plugin, we must use backtick (underneath the 'Esc') to surround them and keep what they are in origin.
+- For nouns, verbs, pronouns, adjectives and adverbs, capitalize the first character. For prepsitions, articles, conjections, interjections and auxiliary words, the first character should be in lowercase. **the character of the first word and the last word for title should be capitalized, regardless of what it is**.
+- For proper nouns such as the direct reference of a variable or a name of some plugin, we must use backtick (underneath the 'Esc') to surround them and keep what they are in origin.
 - For prepsitions more than 5 characters, their first characters should be also capitalized, otherwise not.
 - For some very important titles or some fixed proper nouns such as methods of Http: POST,GET,PUT,DELETE, every charater can be capitalized (USE WITH CAUTION).
 - If the article belongs to the form of O-V (Object-Verb) such as "Config Management", we'd better translate it as "Management Configuration", or "Managing Configuration" in the form of "gerund+noun".