v6.1.5

What's Changed

• Update WITHDRAWAL_ADDRESS in defaults.env by @barnabasbusa in #309
• chore: update to latest spec by @barnabasbusa in #311
• chore(deps): bump actions/checkout from 7.0.0 to 7.0.1 in the actions group by @dependabot[bot] in #310
• chore: remove obsolete teku compatibility shim by @barnabasbusa in #312
• feat: remove deprecated SECONDS_PER_SLOT in favor of SLOT_DURATION_MS by @barnabasbusa in #268
• remove osaka/amsterdam bpo settings by @pk910 in #247

Full Changelog: v6.1.4...v6.1.5