Image tags without src

[caugner]

While testing out mdn/yari#8571, Sentry collected the following errors regarding <img> tags without a src attribute.

es

• In /es/docs/Web/API/Element/clientTop there's an img tag without src (<img alt="Image:clientTop.png">)
• In /es/docs/Web/API/Element/clientLeft there's an img tag without src (<img alt="Image:clientLeft.png">)
• In /es/docs/Web/API/Element/clientLeft there's an img tag without src (<img alt="La barra de desplazamiento vertical en el lado izquierdo, aparece cuando la propiedad layout.scrollbar.side tiene el valor 1 o 3">)

fr

• In /fr/docs/Mozilla/Add-ons/WebExtensions/Firefox_differentiators there's an img tag without src (<img alt="containers.png">) Remove-redirect non agnostic webext page about Fx WebExt differentiators content#26242
• In /fr/docs/Learn/Getting_started_with_the_web/HTML_basics there's an img tag without src (<img src="" alt="Mon image de test">) Fix #12579 for fr #12818

ko

• In /ko/docs/Web/SVG/Tutorial/SVG_and_CSS there's an img tag without src (<img alt="SVG demonstration">)
• In /ko/docs/Web/API/Window/toolbar there's an img tag without src (<img alt="Image:Modify_any_open_window_dialog.png">)
• In /ko/docs/orphaned/Web/SVG/SVG_1.1_Support_in_Firefox there's an img tag without src (<img alt="그림:그림-text-fill-stroke.png">)

[SphinxKnight]

#12818 has been opened for the two docs in fr

[alattalatta]

ko's fixed by #12488 and #12648.

[Graywolf9]

es attended in #12964