Adds upgrading part to the README

* Links to the Releases page where the information is available

.devcontainer/devcontainer.json

@@ -1,5 +0,0 @@
-{
-  "name": "Node.js",
-  "image": "mcr.microsoft.com/devcontainers/javascript-node:1-18-bullseye",
-  "postCreateCommand": "npm i"
-}

.github/workflows/junie.yml

@@ -1,22 +0,0 @@
-name: Junie
-run-name: Junie run ${{ inputs.run_id }}
-
-permissions:
-  contents: write
-  pull-requests: write
-
-on:
-  workflow_dispatch:
-    inputs:
-      run_id:
-        description: "id of workflow process"
-        required: true
-      workflow_params:
-        description: "stringified params"
-        required: true
-
-jobs:
-  call-workflow-passing-data:
-    uses: jetbrains-junie/junie-workflows/.github/workflows/ej-issue.yml@main
-    with:
-      workflow_params: ${{ inputs.workflow_params }}

README.md

@@ -55,6 +55,9 @@ npm install --save @adyen/api-library
 
 Alternatively, you can download the [release on GitHub](https://github.com/Adyen/adyen-node-api-library/releases).
 
+## Upgrading
+
+Please check the **[release page](https://github.com/Adyen/adyen-node-api-library/releases/)** to check for breaking changes in Major versions.
 
 ## Using the library