chore: add missing verb in comment

Co-authored-by: Vaughn Dice <[email protected]>
Signed-off-by: Thorsten Hans <[email protected]>

Author: ThorstenHans

src/lib.rs

@@ -36,7 +36,7 @@ const DIRECTORY_FALLBACK_PATH: &str = "index.html";
 const FAVICON_ICO_FILENAME: &str = "favicon.ico";
 // FAVICON_PNG_FILENAME
 const FAVICON_PNG_FILENAME: &str = "favicon.png";
-// Fallback favicon.png that is used when user does not a custom one
+// Fallback favicon.png that is used when user does not supply a custom one
 const FALLBACK_FAVICON_PNG: &[u8] = include_bytes!("../spin-favicon.png");
 // Fallback favicon.ico that is used when user does not a custom one
 const FALLBACK_FAVICON_ICO: &[u8] = include_bytes!("../spin-favicon.ico");