Fix Lesson 6

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Delete lesson-6.-inline-keyboards-and-editing-message's-text.md

Update README.md

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Merge pull request #7 from 2Fey/patch-2

Merge pull request #8 from 2Fey/patch-3

Update Main.java

Update MyAmazingBot.java

Updates README.md

Updates README.md

Updates README.md

Update chapter1.md

Add imports and check code