Pre-release: Update version to 2.26.1 (#1344)

This PR updates the version to 2.26.1.

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---------

Co-authored-by: github-actions <github-actions@github.com>

Author: aws-application-signals-bot

CHANGELOG.md

@@ -13,6 +13,8 @@ If your change does not need a CHANGELOG entry, add the "skip changelog" label t
 
 ## Unreleased
 
+## v2.26.1 - 2026-03-27
+
 - Bump OpenTelemetry Java Instrumentation version to 2.26.1
   ([#1342](https://github.com/aws-observability/aws-otel-java-instrumentation/pull/1342))
 - End support for ADOT Java 1.x: remove v1 image scans and update README#1339

version.gradle.kts

@@ -13,7 +13,7 @@
  * permissions and limitations under the License.
  */
 
-val adotVersion = "2.25.1-SNAPSHOT"
+val adotVersion = "2.26.1"
 
 allprojects {
   if (!project.hasProperty("release.version")) {