Update silk screen and board version

Adjust silk screen graphics to match current layout. Adjust silk screen
reference designator placements. Bump date and version of schematics and
PCB.

Signed-off-by: Stefan Agner <stefan@agner.ch>

Yellow.kicad_prl

@@ -1,7 +1,7 @@
 {
   "board": {
     "active_layer": 0,
-    "active_layer_preset": "",
+    "active_layer_preset": "All Layers",
     "auto_track_width": true,
     "hidden_nets": [],
     "high_contrast_mode": 1,
@@ -18,7 +18,7 @@
       "footprints": true,
       "graphics": true,
       "keepouts": true,
-      "lockedItems": false,
+      "lockedItems": true,
       "otherItems": true,
       "pads": true,
       "text": true,
@@ -33,7 +33,6 @@
       3,
       4,
       5,
-      6,
       8,
       9,
       10,
@@ -63,7 +62,7 @@
       35,
       36
     ],
-    "visible_layers": "ffffff0_ffffffff",
+    "visible_layers": "fffffff_ffffffff",
     "zone_display_mode": 0
   },
   "meta": {