fix: summary json link name

Signed-off-by: James McCorrie <[email protected]>

Author: machshev

src/dvsim/templates/reports/summary_report.html

@@ -81,7 +81,7 @@ <h2>Simulation Results: {{ top.name }}</h2>
                 sha: {{ top.commit[:7] }}
             </a>
             <a class="badge text-bg-secondary link-underline link-underline-opacity-0"
-               href="report.json">json</a>
+               href="index.json">json</a>
             <span class="badge text-bg-secondary">
                 Branch: {{ top.branch }}
             </span>