Release v2.6

What's Changed

• Increase version number by @rlreamy in #44
• KPMP-5365: replace tissueType by @HaneenT in #45
• push data to elastic search by @Dert1129 in #46
• chnage ethnicity to race by @Dert1129 in #47
• KPMP-5700: Commented out test to fix later. Added code to both types … by @rlreamy in #48
• KPMP-5700: need to return null for blank string so we do not see blan… by @rlreamy in #49
• KPMP-5700: fix tests by @rlreamy in #50
• Update changelog.md by @rlreamy in #51
• Release v2.6 (Q4 2024) by @rlreamy in #52

Full Changelog: v2.5...v2.6