docs(multiple): add warning about push to GAR failure (#1555)

* docs(multiple): add warning about push to GAR failure

* prettier

* Clarify Google Artifact Registry push error message

Updated warning about Google Artifact Registry bug for clarity.

* Update warning about Workload Identity Federation bug

Author: ricky-undeadcoders

actions/docker-build-push-image/README.md

@@ -15,6 +15,12 @@ This can push to the following registries:
 1. Google Artifact Registry
 2. DockerHub
 
+> [!WARNING]
+> There is a [bug with Google Artifact Registry](https://issuetracker.google.com/issues/390719013?pli=1) that prevents docker images from pushing successfully if the
+> branch name is too long. This is due a max length with Workload Identity Federation claims on Google's side.
+>
+> Should you use this action and get a `400` error when pushing the image... try shortening the branch name.
+
 [docker/build-push-action]: https://github.com/docker/build-push-action
 [docker-build-push-image]: ../docker-build-push-image/README.md
 [docker-export-digest]: ../docker-export-digest/README.md

actions/login-to-gar/README.md

@@ -4,6 +4,12 @@ This is a composite GitHub Action, used to login to Google Artifact Registry
 (GAR). It uses [OIDC authentication], which means that only workflows which get
 triggered based on certain rules can trigger these composite workflows.
 
+> [!WARNING]
+> There is a [bug with Workload Identity Federation](https://issuetracker.google.com/issues/390719013?pli=1) that prevents docker images from pushing successfully if the
+> branch name is too long. This is due a max length with Workload Identity Federation claims on Google's side.
+>
+> Should you use this action and get a `400` error when pushing the image... try shortening the branch name.
+
 <!-- x-release-please-start-version -->
 
 ```yaml