Build: Remove extra commas in calling INSTANTIATE_TEST_SUITE_P.

Hopefully, this fixes the sudden new breakage with the bots.
diff --git a/gtests/Link.FromFile.cpp b/gtests/Link.FromFile.cpp
index 49d021a..abc33a9 100644
--- a/gtests/Link.FromFile.cpp
+++ b/gtests/Link.FromFile.cpp
@@ -101,7 +101,7 @@
         {"max_vertices_0.geom"},
         {"es-link1.frag", "es-link2.frag"},
         {"missingBodies.vert"}
-    })),
+    }))
 );
 // clang-format on