v2.15.0

What's Changed

• Bump actions/download-artifact from 7 to 8 by @dependabot[bot] in #2119
• Bump actions/upload-artifact from 6 to 7 by @dependabot[bot] in #2120
• Remove unused variables by @cqc-alec in #2122
• Don't cancel two-qubit gates in SquashRzPhasedX. by @cqc-alec in #2123
• Small optimization in KAK by @cqc-alec in #2124
• chore: Set up explicit re-exports for circuits by @johnchildren in #2125
• Re-export UnitType by @cqc-alec in #2126
• Re-export more symbols by @cqc-alec in #2127
• Update changelog for 2.15.0 release. by @cqc-alec in #2128

Full Changelog: v2.14.0...v2.15.0