Release 1.4.0

[mpstefan]

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Issue to track the release tasks for 1.4.0 following our release process.

### Tasks
- [ ] Create release branch
- [ ] Run through examples manually
- [ ] Create release PR
- [ ] Merge release PR
- [ ] Create release tag
- [ ] Create release PR for main branch
- [ ] Ask docs team to update docs production branch
- [ ] Submit conformance profle report

Release Owner Rotation

• Kate
• Saylor <<<
• Luca
• Saloni
• Ben
• Sindhu