a11y(darkmode): use a button for the theme toggle (#1335)

Andrew

2024-08-24 4c9e8601504f76dcc3c273ea8ad1862df432b7b4

 quartz/plugins/transformers/links.ts

@@ -65,6 +65,7 @@
                    type: "element",
                    tagName: "svg",
                    properties: {
                      "aria-hidden": "true",
                      class: "external-icon",
                      viewBox: "0 0 512 512",
                    },