chore(ci): add project config to issue templates

[dreamorosi]

Description of your changes

As described in the linked issue GitHub has added a new field to the Issue Templates that allows to specify one or more GitHub projects where newly created issues will be added automatically.

This PR sets the public board as default project for all new issues.

Related issues, RFCs

Issue number: closes #1651

Checklist

• My changes meet the tenets criteria
• I have performed a self-review of my own code
• I have commented my code where necessary, particularly in areas that should be flagged with a TODO, or hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my change is effective and works
• The PR title follows the conventional commit semantics

Breaking change checklist

Is it a breaking change?: NO

• I have documented the migration process
• I have added, implemented necessary warnings (if it can live side by side)

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[sonarqubecloud]

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