fix: Add file extention check into single middleware matcher.

[bryan-robitaille]

Summary | Résumé

The current middleware was behaving unexpectedly with the current matcher array. The documentation was not clear that the array represents a logical OR between matchers and not a logical AND. The matchers were originally seperated for readability but have now been combined to ensure proper functionality.

Discovered because favicon.ico was having a language parameter added to it's path by the middleware which in turn caused the browser to receive a 404 when requesting the redirected path.

Test instructions | Instructions pour tester la modification

• Open browser and navigate to the site.
• Ensure favicon is displayed in the browser tab.

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[wmoussa-gc]

small typo extension