Fix field dimensions for 2023 debug webpage

Change-Id: I1235d6c6e0cf13a1bc9e8f5eed33de820a544065
Signed-off-by: James Kuszmaul <jabukuszmaul@gmail.com>
diff --git a/y2023/www/constants.ts b/y2023/www/constants.ts
index b94d7a7..d6ecfaf 100644
--- a/y2023/www/constants.ts
+++ b/y2023/www/constants.ts
@@ -2,6 +2,7 @@
 export const IN_TO_M = 0.0254;
 export const FT_TO_M = 0.3048;
 // Dimensions of the field in meters
-export const FIELD_WIDTH = 26 * FT_TO_M + 11.25 * IN_TO_M;
-export const FIELD_LENGTH = 52 * FT_TO_M + 5.25 * IN_TO_M;
+// Numbers are slightly hand-tuned to match the PNG that we are using.
+export const FIELD_WIDTH = 26 * FT_TO_M + 7.25 * IN_TO_M;
+export const FIELD_LENGTH = 54 * FT_TO_M + 5.25 * IN_TO_M;