Where did the text come from? Assuming you pasted it in, then Webflow is simply presenting the text you put in. If you use straight quotes, like "these" then the quotes should be straight. If you entered typographical quotes, like “these” then the quotes should be curly. If you want to use the typographical ones, you'll need to know how to enter that, depending on your operating system and keyboard layout. Another option is to use character entities for left double quote and right double quote, which are an ampersand immediately followed by ldquo or rdquo immediately followed by a semicolon. That's ugly but it usually works in the viewer's browser.