Add missing changelog for release 0.99.1 (#1287)

Author: jvoravong

.chloggen/update-dotnet.yaml

@@ -11,6 +11,7 @@
 - `agent`: Add an option `skipInitContainers` to skip init container setting file ACLs when the `runAsUser` and
   `runAsGroup` are provided. This is useful when the user wants to manage the file ACLs themselves.
   ([#1286](https://github.com/signalfx/splunk-otel-collector-chart/pull/1286))
+- `operator`: Bump dotnet to v1.5.0 in helm-charts/splunk-otel-collector/values.yaml ([#1282](https://github.com/signalfx/splunk-otel-collector-chart/pull/1282))
 
 ## [0.99.0] - 2024-04-26