correct home server URL (#11391)

* correct home server URL

* update snapshot

---------

Co-authored-by: Neeraj <neerajv@thirdrocktechkno.com>
Co-authored-by: Michael Telatynski <7t3chguy@gmail.com>

src/components/views/dialogs/ServerPickerDialog.tsx

@@ -244,7 +244,7 @@ export default class ServerPickerDialog extends React.PureComponent<IProps, ISta
 
                     <h2>{_t("Learn more")}</h2>
                     <ExternalLink
-                        href="https://matrix.org/faq/#what-is-a-homeserver%3F"
+                        href="https://matrix.org/docs/matrix-concepts/elements-of-matrix/#homeserver"
                         target="_blank"
                         rel="noreferrer noopener"
                     >

test/components/views/dialogs/__snapshots__/ServerPickerDialog-test.tsx.snap

@@ -122,7 +122,7 @@ exports[`<ServerPickerDialog /> should render dialog 1`] = `
       </h2>
       <a
         class="mx_ExternalLink"
-        href="https://matrix.org/faq/#what-is-a-homeserver%3F"
+        href="https://matrix.org/docs/matrix-concepts/elements-of-matrix/#homeserver"
         rel="noreferrer noopener"
         target="_blank"
       >