Update tofu actions

Author: dflook

.github/workflows/test.yaml

@@ -55,3 +55,17 @@ jobs:
           TERRAFORM_ACTIONS_GITHUB_TOKEN: No
         run: |
            GNUPGHOME=$HOME/.gnupg PYTHONPATH=image/tools:image/src pytest tests
+
+  tofu:
+    runs-on: ubuntu-latest
+    name: OpenTofu
+    env:
+      GITHUB_TOKEN: ${{ secrets.RELEASE_GITHUB_TOKEN }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Check tofu actions are up to date
+        run: |
+          python3 tofu/tofuize.py
+          git diff --exit-code

tofu-plan/README.md

@@ -141,8 +141,11 @@ The [dflook/tofu-apply](https://github.com/dflook/terraform-github-actions/tree/
 
 * `add_github_comment`
 
+  Controls whether a comment is added to the PR with the generated plan.
+
   The default is `true`, which adds a comment to the PR with the results of the plan.
   Set to `changes-only` to add a comment only when the plan indicates there are changes to apply.
+  Set to `always-new` to always create a new comment for each plan, instead of updating the previous comment.
   Set to `false` to disable the comment - the plan will still appear in the workflow log.
 
   - Type: string
@@ -345,7 +348,7 @@ The [dflook/tofu-apply](https://github.com/dflook/terraform-github-actions/tree/
 
 ## Workflow events
 
-When adding the plan to a PR comment (`add_github_comment` is set to `true`/`changes-only`), the workflow can be triggered by the following events:
+When adding the plan to a PR comment (`add_github_comment` is not `false`), the workflow can be triggered by the following events:
 
   - pull_request
   - pull_request_review_comment