Seems like you manually added the title thus not being meant to be that long. you could find a way to make the text into two lines. instead of one. other wise if you g into editor their should be a possible way to decrease the font size. Sorry im not that good yet in programming and what not. But the units for font size is “px”.
such as
font-size: 10px
find this term into the section of the editor relating to “Header”
