chore: fix typo in README.md [ci skip] (#12064)

Author: eltociear

README.md

@@ -17,7 +17,7 @@ Vue.js is an MIT-licensed open source project with its ongoing development made
 
 - [Become a backer or sponsor on Patreon](https://www.patreon.com/evanyou).
 - [Become a backer or sponsor on Open Collective](https://opencollective.com/vuejs).
-- [One-time donation via PayPal or crypto-currencies.](https://vuejs.org/support-vuejs/#One-time-Donations)
+- [One-time donation via PayPal or crypto-currencies](https://vuejs.org/support-vuejs/#One-time-Donations).
 
 #### What's the difference between Patreon and OpenCollective?