fix: change old url to new one

Author: steven-ja

README.md

@@ -6,20 +6,21 @@ On my website you can find a detailed summary of my work experience, education p
 ## Blog
 Moreover, I will use this website as a blogging platform. I will talk about several interesting topics:
 
-1. [Finance](https://ragespin.github.io/posts/finance/):
+1. [Finance](https://steven-ja.github.io/posts/finance/):
    - Stock Prediction
       - [x] ARIMA
       - [x] SARIMA
       - [x] SARIMAX
       - [x] GRU/ LSTM
-      - [ ] GARCH
-   - Monte Carlo
+      - [x] GARCH
+   - [x] Monte Carlo 
+   - Hidden Markov Models for Market Condition
    - Portfolio Optimization
-2. [Physics](https://ragespin.github.io/posts/physics):
+2. [Physics](https://steven-ja.github.io/posts/physics):
    - [x] Percolation 
    - [ ] Water Dynamics
    - [ ] Lunar Lander (and Earth/ Mars Lander)
-3. [Machine Learning](https://ragespin.github.io/posts/machine-learning/):
+3. [Machine Learning](https://steven-ja.github.io/posts/machine-learning/):
    - Deep Learning:
       - Computer Vision
          - [x] Image Segmentation with (Florence-2, ...)