Update README.md

Author: ss7622

README.md

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 #### Framwork - ![spring](https://img.shields.io/badge/Spring-6DB33F?style=for-the-badge&logo=spring&logoColor=white)  
 
-#### Security - ![springsecurity](https://img.shields.io/badge/springsecurity-6DB33F.svg?style=for-the-badge&logo=springsecurity&logoColor=white)  ![jsonwebtokens](https://img.shields.io/badge/jsonwebtokens-000000.svg?style=for-the-badge&logo=jsonwebtokens&logoColor=white)  
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+#### Security - ![springsecurity](https://img.shields.io/badge/springsecurity-6DB33F.svg?style=for-the-badge&logo=springsecurity&logoColor=white)  ![jsonwebtokens](https://img.shields.io/badge/jsonwebtokens-000000.svg?style=for-the-badge&logo=jsonwebtokens&logoColor=white)  ![spring-security-oauth2](https://img.shields.io/badge/spring-security-oauth2-000000.svg?style=for-the-badge&logo=spring-security-oauth2&logoColor=white)
 #### Database - ![Postgres](https://img.shields.io/badge/postgres-%23316192.svg?style=for-the-badge&logo=postgresql&logoColor=white)   ![Redis](https://img.shields.io/badge/redis-%23DD0031.svg?style=for-the-badge&logo=redis&logoColor=white)
 
 #### Aws - ![ec2](https://img.shields.io/badge/amazonec2-FF9900?style=for-the-badge&logo=amazonec2&logoColor=white)  ![RDS](https://img.shields.io/badge/amazonrds-527FFF.svg?style=for-the-badge&logo=amazonrds&logoColor=white)   ![S3](https://img.shields.io/badge/amazons3-569A31.svg?style=for-the-badge&logo=amazons3&logoColor=white)  ![Route53](https://img.shields.io/badge/amazonroute53-8C4FFF.svg?style=for-the-badge&logo=amazonroute53&logoColor=white)