fix(e-ink): use correct degree symbols

Author: tyeth

src/components/display/drivers/dispDrvThinkInkGrayscale4Eaamfgn.h

@@ -258,7 +258,7 @@ class drvDispThinkInkGrayscale4Eaamfgn : public dispDrvBase {
         }
       } else if (message[i] == 0xC2 && message[i + 1] == 0xB0) {
         // Degree symbol
-        _display->write(char(248));
+        _display->write(char(247));
         i++;
       } else {
         _display->print(message[i]);

src/components/display/drivers/dispDrvThinkInkGrayscale4T5.h

@@ -124,7 +124,8 @@ class dispDrvThinkInkGrayscale4T5 : public dispDrvBase {
           i++;
         }
       } else if (message[i] == 0xC2 && message[i + 1] == 0xB0) {
-        _display->write(char(248));
+        // Degree symbol
+        _display->write(char(247));
         i++;
       } else {
         _display->print(message[i]);