changelog: fix entry wording for hashicorp#18873 (hashicorp#18927)

.changelog/18873.txt

@@ -1,3 +1,3 @@
 ```release-note:bug
-scheduler: Ensure duplicate allocation IDs are tracked and fixed when performing job updates
+scheduler: Ensure duplicate allocation indexes are tracked and fixed when performing job updates
 ```

CHANGELOG.md

@@ -27,7 +27,7 @@ BUG FIXES:
 * metrics: Fixed a bug where CPU counters could report errors for negative values [[GH-18835](https://github.com/hashicorp/nomad/issues/18835)]
 * scaling: Unblock blocking queries to /v1/job/{job-id}/scale if the job goes away [[GH-18637](https://github.com/hashicorp/nomad/issues/18637)]
 * scheduler (Enterprise): auto-unblock evals with associated quotas when node resources are freed up [[GH-18838](https://github.com/hashicorp/nomad/issues/18838)]
-* scheduler: Ensure duplicate allocation IDs are tracked and fixed when performing job updates [[GH-18873](https://github.com/hashicorp/nomad/issues/18873)]
+* scheduler: Ensure duplicate allocation indexes are tracked and fixed when performing job updates [[GH-18873](https://github.com/hashicorp/nomad/issues/18873)]
 * server: Fixed a bug where Raft server configuration parameters were not correctly merged [[GH-18494](https://github.com/hashicorp/nomad/issues/18494)]
 * services: use interpolated address when performing nomad service health checks [[GH-18584](https://github.com/hashicorp/nomad/issues/18584)]
 * ui: using start/stop from the job page in the UI will no longer fail when the job lacks HCL submission data [[GH-18621](https://github.com/hashicorp/nomad/issues/18621)]
@@ -200,7 +200,7 @@ BUG FIXES:
 * metrics: Fixed a bug where CPU counters could report errors for negative values [[GH-18835](https://github.com/hashicorp/nomad/issues/18835)]
 * scaling: Unblock blocking queries to /v1/job/{job-id}/scale if the job goes away [[GH-18637](https://github.com/hashicorp/nomad/issues/18637)]
 * scheduler (Enterprise): auto-unblock evals with associated quotas when node resources are freed up [[GH-18838](https://github.com/hashicorp/nomad/issues/18838)]
-* scheduler: Ensure duplicate allocation IDs are tracked and fixed when performing job updates [[GH-18873](https://github.com/hashicorp/nomad/issues/18873)]
+* scheduler: Ensure duplicate allocation indexes are tracked and fixed when performing job updates [[GH-18873](https://github.com/hashicorp/nomad/issues/18873)]
 * services: use interpolated address when performing nomad service health checks [[GH-18584](https://github.com/hashicorp/nomad/issues/18584)]
 
 ## 1.5.9 (September 13, 2023)
@@ -584,7 +584,7 @@ BUG FIXES:
 * metrics: Fixed a bug where CPU counters could report errors for negative values [[GH-18835](https://github.com/hashicorp/nomad/issues/18835)]
 * scaling: Unblock blocking queries to /v1/job/{job-id}/scale if the job goes away [[GH-18637](https://github.com/hashicorp/nomad/issues/18637)]
 * scheduler (Enterprise): auto-unblock evals with associated quotas when node resources are freed up [[GH-18838](https://github.com/hashicorp/nomad/issues/18838)]
-* scheduler: Ensure duplicate allocation IDs are tracked and fixed when performing job updates [[GH-18873](https://github.com/hashicorp/nomad/issues/18873)]
+* scheduler: Ensure duplicate allocation indexes are tracked and fixed when performing job updates [[GH-18873](https://github.com/hashicorp/nomad/issues/18873)]
 * services: use interpolated address when performing nomad service health checks [[GH-18584](https://github.com/hashicorp/nomad/issues/18584)]
 
 ## 1.4.13 (September 13, 2023)