chore: update README.md

Author: actions-user

README.md

@@ -73,7 +73,8 @@ this action. For more on setting up those components, see the [`gitops` componen
 ### Config
 
 > [!IMPORTANT]
-> **Please note!** This GitHub Action only works with `atmos >= 1.158.0`.
+> **Please note!** This GitHub Action only works with `atmos >= 1.186.0`.
+> If you are using `atmos >= 1.158.0, < 1.186.0` please use `v4` version of this action.
 > If you are using `atmos >= 1.99.0, < 1.158.0` please use `v3` version of this action.    
 > If you are using `atmos >= 1.63.0, < 1.99.0` please use `v2` version of this action.  
 > If you are using `atmos < 1.63.0` please use `v1` version of this action.
@@ -217,12 +218,19 @@ We recommend combining this action with the [`affected-stacks`](https://atmos.to
       runs-on: ubuntu-latest
       steps:
         - name: Terraform Apply
-          uses: cloudposse/github-action-atmos-terraform-apply@v2
+          uses: cloudposse/github-action-atmos-terraform-apply@v5
           with:
             component: "foobar"
             stack: "plat-ue2-sandbox"
             atmos-config-path: ./rootfs/usr/local/etc/atmos/
 ```
+### Migrating from `v4` to `v5`
+
+The notable changes in `v5` are:
+
+- `v5` works only with `atmos >= 1.186.0`
+- `v5` uses `atmos terraform plan-diff` to ensure changes to be applied are consistent with the stored (approved by the user) planfile.
+
 ### Migrating from `v3` to `v4`
 
 The notable changes in `v4` are: