Fix RGB Matrix max brightness for several splitkb.com keyboards (#22621)

keyboards/splitkb/aurora/corne/rev1/info.json

@@ -163,6 +163,7 @@
             {"flags": 4, "matrix": [4, 0], "x": 224, "y": 7},  // R SW06
             {"flags": 4, "matrix": [5, 0], "x": 224, "y": 24}, // R SW12
             {"flags": 4, "matrix": [6, 0], "x": 224, "y": 41}  // R SW18
-        ]
+        ],
+        "max_brightness": 128
     }
 }

keyboards/splitkb/aurora/lily58/rev1/info.json

@@ -188,6 +188,7 @@
             {"flags": 4, "matrix": [9, 4], "x": 159, "y": 64}, // R SW28
             {"flags": 4, "matrix": [9, 3], "x": 173, "y": 62}, // R SW27
             {"flags": 4, "matrix": [9, 2], "x": 188, "y": 62}  // R SW26
-        ]
+        ],
+        "max_brightness": 128
     }
 }

keyboards/splitkb/aurora/sweep/rev1/info.json

@@ -152,6 +152,7 @@
             {"flags": 4, "matrix": [6, 4], "x": 224, "y": 47},
             {"flags": 4, "matrix": [7, 0], "x": 132, "y": 64},
             {"flags": 4, "matrix": [7, 1], "x": 153, "y": 60}
-        ]
+        ],
+        "max_brightness": 128
     }
 }

keyboards/splitkb/kyria/rev3/info.json

@@ -186,6 +186,7 @@
             {"flags": 4, "matrix": [4, 4], "x": 195, "y": 4},  // R SW04
             {"flags": 4, "matrix": [4, 5], "x": 210, "y": 11}, // R SW05
             {"flags": 4, "matrix": [4, 6], "x": 224, "y": 11}  // R SW06
-        ]
+        ],
+        "max_brightness": 128
     }
 }