Update server/routers/api-router.js

Co-authored-by: Frank Elsinga <frank@elsinga.de>

server/routers/api-router.js

@@ -335,7 +335,7 @@ router.get("/api/badge/:id/ping/:duration?", cache("5 minutes"), async (request,
             // use a given, custom labelColor or use the default badge label color (defined by badge-maker)
             badgeValues.labelColor = labelColor ?? "";
             // build a lable string. If a custom label is given, override the default one (requestedDuration)
-            badgeValues.label = filterAndJoin([ labelPrefix, label ?? `Avg. Ping (${duration}${labelSuffix})` ]);
+            badgeValues.label = filterAndJoin([ labelPrefix, label ?? `Avg. Ping (${requestedDuration.slice(0, -1)}${labelSuffix})` ]);
             badgeValues.message = filterAndJoin([ prefix, avgPing, suffix ]);
         }