Add studied material on README.md

Author: pumpkiinbell

README.md

@@ -17,3 +17,7 @@
 | Forwarding Refs         |     [🔗](./forwarding-refs/jiyong1)     |     [🔗](./forwarding-refs/chaeeun037)     |     [🔗](./forwarding-refs/jonghopark95)     |     [🔗](./forwarding-refs/Seogeurim)     |     [🔗](./forwarding-refs/peanut-lover)     |
 | Fragments               |        [🔗](./fragments/jiyong1)        |        [🔗](./fragments/chaeeun037)        |        [🔗](./fragments/jonghopark95)        |        [🔗](./fragments/Seogeurim)        |        [🔗](./fragments/peanut-lover)        |
 | Higher-Order Components | [🔗](./higher-order-components/jiyong1) | [🔗](./higher-order-components/chaeeun037) | [🔗](./higher-order-components/jonghopark95) | [🔗](./higher-order-components/Seogeurim) | [🔗](./higher-order-components/peanut-lover) |
+| Integrating With Other Libraries | [🔗](./integrating-with-other-libraries/jiyong1) | [🔗](./integrating-with-other-libraries/chaeeun037) | [🔗](./integrating-with-other-libraries/jonghopark95) | [🔗](./integrating-with-other-libraries/Seogeurim) | [🔗](./integrating-with-other-libraries/peanut-lover) |
+| JSX in Depth | [🔗](./jsx-in-depth/jiyong1) | [🔗](./jsx-in-depth/chaeeun037) | [🔗](./jsx-in-depth/jonghopark95) | [🔗](./jsx-in-depth/Seogeurim) | [🔗](./jsx-in-depth/peanut-lover) |
+| Optimizing Performance | [🔗](./optimizing-performance/jiyong1) | [🔗](./optimizing-performance/chaeeun037) | [🔗](./optimizing-performance/jonghopark95) | [🔗](./optimizing-performance/Seogeurim) | [🔗](./optimizing-performance/peanut-lover) |
+| Portal | [🔗](./portal/jiyong1) | [🔗](./portal/chaeeun037) | [🔗](./portal/jonghopark95) | [🔗](./portal/Seogeurim) | [🔗](./portal/peanut-lover) |