Update README.md

INVESTAR · web-flow · commit cf152581d43a · 2021-01-31T15:21:56.000+09:00
diff --git a/README.md b/README.md
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 - &#49436;&#51201;&#50640; &#49341;&#51077;&#46108; &#44536;&#47548;&#51032; PPT &#50896;&#48376;&#51008; PowerPoint_Materials.pptx &#54028;&#51068;&#50640; &#51080;&#49845;&#45768;&#45796;.
 
-![Portpolio_optimization](./06_Trading_Strategy/imgs/Portpolio_optimization.jpg)
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 ## &#45348;&#51060;&#48260; &#44552;&#50997;&#51032; &#50937; &#49828;&#53356;&#47112;&#51060;&#54609; &#52264;&#45800;&#50640; &#45824;&#54620; &#50504;&#45236;
 2021&#45380; 1&#50900; 7&#51068; &#51200;&#45377;&#48512;&#53552; &#45348;&#51060;&#48260; &#44552;&#50997;&#50640;&#49436; &#50937; &#53356;&#47204;&#47084;&#51032; &#49828;&#53356;&#47112;&#51060;&#54609;&#51012; &#52264;&#45800;&#54616;&#44592; &#49884;&#51089;&#54664;&#49845;&#45768;&#45796;. 
 &#46384;&#46972;&#49436; &#44592;&#51316; &#48169;&#49885;&#45824;&#47196; urllib.request.urlopen()&#51060;&#45208; pandas.read_html()&#47484; &#49324;&#50857;&#54624; &#44221;&#50864;,

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 - 서적에 삽입된 그림의 PPT 원본은 PowerPoint_Materials.pptx 파일에 있습니다.
 -![Portpolio_optimization](./06_Trading_Strategy/imgs/Portpolio_optimization.jpg)
+-
 ## 네이버 금융의 웹 스크레이핑 차단에 대한 안내
 년 1월 7일 저녁부터 네이버 금융에서 웹 크롤러의 스크레이핑을 차단하기 시작했습니다.
 따라서 기존 방식대로 urllib.request.urlopen()이나 pandas.read_html()를 사용할 경우,