Prepare to release 3.7.8 (#4659)

Author: xiang17

CHANGELOG.md

@@ -1,5 +1,16 @@
 # CHANGELOG
 
+## Version 3.7.8 GA (03/24/2026)
+
+* Update to OpenTelemetry Java Instrumentation 2.26.1
+  ([#4648](https://github.com/microsoft/ApplicationInsights-Java/pull/4648),
+  [#4632](https://github.com/microsoft/ApplicationInsights-Java/pull/4632),
+  [#4631](https://github.com/microsoft/ApplicationInsights-Java/pull/4631))
+* Add cgroupv2 support and fix profile upload response body reading
+  ([#4592](https://github.com/microsoft/ApplicationInsights-Java/pull/4592))
+* Fix connection string env var precedence over ${file:...} config lookup
+  ([#4608](https://github.com/microsoft/ApplicationInsights-Java/pull/4608))
+
 ## Version 3.7.7 GA (01/23/2026)
 
 ### Enhancements

gradle.properties

@@ -1,5 +1,5 @@
 // Project properties
-version=3.7.7
+version=3.7.8
 
 org.gradle.parallel=true
 org.gradle.caching=true