fix: correct square image validation logic in resizeBase64Image (#25130)

The validation was comparing image height to itself instead of comparing height to width, causing the square check to always pass even for non-square images.

Co-authored-by: Dhairyashil Shinde <93669429+dhairyashiil@users.noreply.github.com>

packages/lib/server/resizeBase64Image.ts

@@ -26,7 +26,7 @@ export async function resizeBase64Image(
     maxSize = 96 * 4,
   } = opts ?? {};
   const image = await jimp.read(buffer);
-  if (image.getHeight() !== image.getHeight()) {
+  if (image.getHeight() !== image.getWidth()) {
     // this could be handled later
     throw new Error("Image is not a square");
   }