fix header image

CamDavidsonPilon · web-flow · commit 22058855c870 · 2023-04-12T15:52:59.000-04:00
diff --git a/_posts/2023-04-11-natto.md b/_posts/2023-04-11-natto.md
@@ -1,6 +1,6 @@
 ---
 title: 'I wrote a book on Natto '
-image: assets/images/natto_book/cover.jpg
+image: assets/images/natto_book/cover.JPG
 tags:
 - natto
 - solid-state-fermentation
