Update README.md

1.54inch_e-paper_code/README.md

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 # 1.54inch e-Paper  
-![1.54inch-e-Paper-intro.JPG](1.54inch-e-Paper-intro.JPG)
+![1.54inch-e-Paper-intro.JPG](1.54inch-e-paper-intro.JPG)
 
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 中文：