Inflation chart burn event fix

[bobo-k2]

Pull Request Summary

Token burning on Astar happened today and realized inflation chart went wrong. This happened because actual token issuance after burning is lower than at the beginning of staking period 1.

As a quick fix I deduced burned amount from token issuance at the beginning of period 1.

Check list

• [ ] contains breaking changes
• [ ] adds new feature
• [x] modifies existing feature (bug fix or improvements)
• [ ] relies on other tasks
• [ ] documentation changes
• [ ] tested on mobile devices

[github-actions[bot]]

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