Update Introduction_TSA.md

Author: ajitsingh98

Introduction_TSA.md

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 # Introduction to Time Series Analysis
 
 Contents
---
-- [1. Taxonomy of Time Series Analysis Domain](#taxonomy-of-time-series-analysis-domain)
-- [2. Best Practices for Forecasting Model Development](#best-practices-for-forecasting-model-development)
-- [3. Simple and Classical Forecasting Methods](#simple-and-classical-forecasting-methods)
-- [4. Time Series to Supervised Learning Problem](#time-series-to-supervised-learning-problem)
-- [5. Deep Learning for Time Series Forecasting](#deep-learning-for-time-series-forecasting)
+---
+- [Taxonomy of Time Series Analysis Domain](#taxonomy-of-time-series-analysis-domain)
+- [Best Practices for Forecasting Model Development](#best-practices-for-forecasting-model-development)
+- [Simple and Classical Forecasting Methods](#simple-and-classical-forecasting-methods)
+- [Time Series to Supervised Learning Problem](#time-series-to-supervised-learning-problem)
+- [Deep Learning for Time Series Forecasting](#deep-learning-for-time-series-forecasting)
 
 ## 1. Taxonomy of Time Series Analysis Domain