v2.9.0

What's Changed

• Improve Clifford detection for PhasedX by @cqc-alec in #1987
• Fix implicit Clifford merging in GreedyPauliSimp by @sjdilkes in #1989
• chore: Single source of truth for tket version by @lmondada in #1988
• Add TK1 gate support to GreedyPauliSimp by @sjdilkes in #1991
• fix: correct Windows conan hash by @lmondada in #1993
• Fix docs build. by @cqc-alec in #1994
• Update changelog for 2.9.0 release. by @cqc-alec in #1990

Full Changelog: v2.8.0...v2.9.0