Post release 2.20.0: Update version to 2.20.0-SNAPSHOT (#1263)

This PR prepares the main branch for the next development cycle by
updating the version to 2.20.0-SNAPSHOT and updating the image version
to be scanned to the latest released.

This PR should only be merge when release for version v2.20.0 is
success.

By submitting this pull request, I confirm that you can use, modify,
copy, and redistribute this contribution, under the terms of your
choice.

---------

Co-authored-by: github-actions <[email protected]>
Co-authored-by: Eric Zhang <[email protected]>

Author: 3 people

.github/workflows/daily-scan.yml

@@ -110,7 +110,7 @@ jobs:
         id: high_scan_v2
         uses: ./.github/actions/image_scan
         with:
-          image-ref: "public.ecr.aws/aws-observability/adot-autoinstrumentation-java:v2.11.5"
+          image-ref: "public.ecr.aws/aws-observability/adot-autoinstrumentation-java:v2.20.0"
           severity: 'CRITICAL,HIGH'
           logout: 'false'
 
@@ -119,7 +119,7 @@ jobs:
         id: low_scan_v2
         uses: ./.github/actions/image_scan
         with:
-          image-ref: "public.ecr.aws/aws-observability/adot-autoinstrumentation-java:v2.11.5"
+          image-ref: "public.ecr.aws/aws-observability/adot-autoinstrumentation-java:v2.20.0"
           severity: 'MEDIUM,LOW,UNKNOWN'
           logout: 'false'
 

CHANGELOG.md

@@ -13,6 +13,8 @@ If your change does not need a CHANGELOG entry, add the "skip changelog" label t
 
 ## Unreleased
 
+## v2.20.0 - 2025-10-29
+
 ### Enhancements
 
 - Support X-Ray Trace Id extraction from Lambda Context object, and respect user-configured OTEL_PROPAGATORS in AWS Lamdba instrumentation