docs: Announce deprecation of v1

Author: phipag

docs/processes/versioning.md

@@ -55,6 +55,7 @@ To see the list of available major versions of Powertools for AWS Lambda and whe
 
 ### Version support matrix
 
-| SDK                              | Major version | Current Phase        | General Availability Date | Notes                                                                                             |
-| -------------------------------- | ------------- | -------------------- | ------------------------- | ------------------------------------------------------------------------------------------------- |
-| Powertools for AWS Lambda (Java) | 1.x           | General Availability | 11/04/2020                | See [Release notes](https://github.com/aws-powertools/powertools-lambda-java/releases/tag/v1.0.0) |
+| SDK                              | Major version | Current Phase        | General Availability Date | Notes                                                                                                               |
+| -------------------------------- | ------------- | -------------------- | ------------------------- | ------------------------------------------------------------------------------------------------------------------- |
+| Powertools for AWS Lambda (Java) | 2.x           | General Availability | 06/12/2025                | See [Release notes](https://github.com/aws-powertools/powertools-lambda-java/releases/tag/v2.0.0)                   |
+| Powertools for AWS Lambda (Java) | 1.x           | Maintenance          | 11/04/2020                | End-of-support: December 12, 2025. See [upgrade guide](https://docs.powertools.aws.dev/lambda/java/latest/upgrade/) |

docs/upgrade.md

@@ -5,7 +5,10 @@ description: Guide to update between major Powertools for AWS Lambda (Java) vers
 
 ## End of support v1
 
-<!-- TODO: Add end of support banner here once developer preview started. -->
+<!-- prettier-ignore-start -->
+!!! warning "End of support notice"
+    On December 12th, 2025, Powertools for AWS Lambda (Java) v1 will reach end of support and will no longer receive updates or releases. If you are still using v1, we strongly recommend you to read our upgrade guide and update to the latest version.
+<!-- prettier-ignore-end -->
 
 Given our commitment to all of our customers using Powertools for AWS Lambda (Java), we will keep [Maven Central](https://central.sonatype.com/search?q=powertools){target="\_blank"} `v1` releases and a `v1` documentation archive to prevent any disruption.