This PR fixes several typos in release notes documentation and test code:
- Fix “unusued” to “unused” in release-notes-0.15.0.md
- Fix “wtxOrdered” to “wtxOrdered” in release-notes-0.16.2.md
- Fix “mistmatch” to “mismatch” in release-notes-0.16.2.md
- Fix “reseting” to “resetting” in release-notes-0.16.2.md
- Fix “trunction” to “truncation” in release-notes-0.18.0.md
- Fix “seperate” to “separate” in release-notes-0.18.0.md
- Fix “unitialized” to “uninitialized” in release-notes-0.18.0.md
- Fix “unintialized” to “uninitialized” in release-notes-0.19.1.md
- Fix “interference” to “interference” in mining_basic.py
These fixes improve documentation and code quality.