web/flows: fix device picker incorrect foreground color (#8067)

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

web/src/flow/stages/authenticator_validate/AuthenticatorValidateStage.ts

@@ -89,6 +89,9 @@ export class AuthenticatorValidateStage
                 display: flex;
                 align-items: center;
             }
+            :host([theme="dark"]) .authenticator-button {
+                color: var(--ak-dark-foreground) !important;
+            }
             i {
                 font-size: 1.5rem;
                 padding: 1rem 0;