[util] Enable cached dynamic resources for AC3 and AC4

Without it, AC3 chugs along at 40 FPS on my 5950X.

src/util/config/config.cpp

@@ -274,6 +274,10 @@ namespace dxvk {
     { R"(\\Warhammer3\.exe$)", {{
       { "d3d11.maxDynamicImageBufferSize",  "4096" },
     }} },
+    /* Assassin's Creed 3 and 4                   */
+    { R"(\\ac(3|4bf)[sm]p\.exe$)", {{
+      { "d3d11.cachedDynamicResources",     "a"    },
+    }} },
 
     /**********************************************/
     /* D3D9 GAMES                                 */