[WebProfilerBundle] Fixed js escaping in time.html.twig

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets |
| License       | MIT
| Doc PR        | 

For some event names I received the JavaScript error: ```Uncaught SyntaxError: Unexpected token ILLEGAL```