Changelog for v0.74.0 (#2919)

* Changelog for v0.74.0

* Update CHANGELOG.md

Co-authored-by: Ryan Fitzpatrick <10867373+rmfitzpatrick@users.noreply.github.com>

---------

Co-authored-by: Ryan Fitzpatrick <10867373+rmfitzpatrick@users.noreply.github.com>

CHANGELOG.md

@@ -2,6 +2,19 @@
 
 ## Unreleased
 
+## v0.74.0
+
+This Splunk OpenTelemetry Collector release includes changes from the [opentelemetry-collector v0.74.0](https://github.com/open-telemetry/opentelemetry-collector/releases/tag/v0.74.0) and the [opentelemetry-collector-contrib v0.74.0](https://github.com/open-telemetry/opentelemetry-collector-contrib/releases/tag/v0.74.0) releases where appropriate.
+
+### 💡 Enhancements 💡
+- [Relocate agent codebase into pkg/signalfx-agent](https://github.com/signalfx/splunk-otel-collector/pull/2717)
+- [Tanzu Tile implementation and documentation](https://github.com/signalfx/splunk-otel-collector/pull/2726)
+- [Mark our internal pulsar exporter as deprecated](https://github.com/signalfx/splunk-otel-collector/pull/2873)
+
+### 🧰 Bug fixes 🧰
+- [Add shutdown method to hostmetadata monitor](https://github.com/signalfx/splunk-otel-collector/pull/2917)
+- [Support core file and env config provider directive resolution](https://github.com/signalfx/splunk-otel-collector/pull/2893)
+
 ## v0.73.0
 
 This Splunk OpenTelemetry Collector release includes changes from the [opentelemetry-collector v0.73.0](https://github.com/open-telemetry/opentelemetry-collector/releases/tag/v0.73.0) and the [opentelemetry-collector-contrib v0.73.0](https://github.com/open-telemetry/opentelemetry-collector-contrib/releases/tag/v0.73.0) releases where appropriate.