Typo Update readme.md

[mdqst]

Description:

This pull request fixes a minor but potentially confusing typo in the "View in PDF" section of the documentation.

Issue:

In the final command under "Convert to PDF," there was an unnecessary backtick (`) at the end of the command:

asciidoctor-pdf src/*.adoc`  

Fix:

The command has been corrected by removing the stray backtick:

asciidoctor-pdf src/*.adoc  

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Importance of Fix:

1. Clarity: Ensures readers can copy-paste the command directly without encountering syntax errors.
2. User Experience: Reduces confusion for users, especially those new to using asciidoctor-pdf.
3. Consistency: Maintains professional and error-free documentation.

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Testing:

• Verified that the corrected command executes without errors.
• Ensured consistency with other commands in the documentation.

Please review and merge this fix to improve the documentation's accuracy.

[reviewable-StarkWare]

This change is