Character encoding issue with workbox notification

Steps to Reproduce:

1. Try to share a page, and add some notes with German characters to the share notification. as you can see in the screenshot below.
   
2. Add the mentioned notification to personal task. as shown in the screenshot below.
   
3. open the personal task. as screenshot below.
   

Actual Results:

German characters will change to entity name of the ISO 8859-1 Characters instead of showing the character itself.