[util] Set max frame latency to 1 for Sonic Frontiers

Seems like the only reason this game passes QA is because there *was* no
QA. Seriously broken when GPU-bound even on Windows.

src/util/config/config.cpp

@@ -319,6 +319,11 @@ namespace dxvk {
     { R"(\\BFBC2Game\.exe$)", {{
       { "d3d11.floatControls",            "False" },
     }} },
+    /* Sonic Frontiers - flickering shadows and   *
+     * vegetation when GPU-bound                  */
+    { R"(\\SonicFrontiers\.exe$)", {{
+      { "dxgi.maxFrameLatency",             "1" },
+    }} },
 
     /**********************************************/
     /* D3D9 GAMES                                 */