Fix reading MatchedMatcher data in BlazePyTracebackParser

[mielnikk]

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• I have filed an issue about this change and discussed potential changes with the maintainers.
• I have received the approval from the maintainers to make this change.
• This is not a stylistic, refactoring, or cleanup change.

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Discussion thread for this change

Issue number: #6652

Description of this change

Referencing groups in MatchedMatcher by 1 and 2 indexes was not correct, so I changed it to how it's done in Python plugin's PyTracebackParser.

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[sgowroji]

Hi @mielnikk, Could you please sign the CLA?