Sa11y is an accessibility quality assurance tool that visually highlights common accessibility and usability issues. Geared towards content authors, Sa11y straightforwardly identifies errors or warnings at the source with a simple tooltip on how to fix them.
link rel=shortcut should not be used https://developer.mozilla.org/en-US/docs/Web/HTML/Attributes/rel so it is removed
Setting the type is also not required so it is removed - if is wanted then it sdhould be corrected instead as its not a jpg ;)