switch fonts to Geist Sans and Geist Mono (#1835)

* switch fonts to Geist Sans and Geist Mono

* adjust font sizes slightly

* fix lockfile

* Update contact.tsx

components/CodeBlock/CodeBlock.tsx

@@ -13,7 +13,7 @@ const Block = styled("div", {
     display: "block",
     overflowX: "auto",
     padding: "1em",
-    fontSize: "0.925em",
+    fontSize: "0.9em",
     tabSize: 2,
 
     // optional line numbers added at time of prism compilation