Indentation switches from 2 to 4 spaces if a step uses `env:` or `with:`

**Describe the bug**

If a job contains a step which uses `env:` or `with:` then the indentation on subsequent lines switches from 2 spaces to 4 spaces. The issue seems to only persist for the rest of the given job and resets in the next one.

**To Reproduce**

1. Start out with this file

```yaml
on: push

jobs:
test:
runs-on: ubuntu-latest

steps:
- name: Step 1
run: echo "step 1"

#- name: Step 2

- name: Step 3
uses: actions/checkout@v2
with:
foo: bar

#- name: Step 4

- name: Step 5
uses: echo "step 5"
env:
foo: bar

#- name: Step 6

- name: Step 7
run: echo "step 7"
```
3. Uncomment step 2, go to the end of the line, press enter then tab, start to type `run:`
5. The resulting text should be aligned with `name` from the line above it
6. Uncomment step 4, go to the end of the line, press enter then tab, start to type `run:`
7. The resulting text will not be aligned with `name` from the line above it, instead it will be indented an extra 2 characters
8. Uncomment step 6, go to the end of the line, press enter then tab, start to type `run:`
9. The resulting text will not be aligned with `name` from the line above it, instead it will be indented an extra 2 characters

**Expected behavior**

The second line of step's 4 and 6 to be aligned with the line above it.

**Screenshots**

https://github.com/github/vscode-github-actions/assets/831974/7c202f2d-a1f3-4097-9735-5cc474eb625c

**Extension Version**

`v0.25.8`

**Additional context**

1. The issue goes away if you switch the file's language from `github-actions-workflow` to `yaml`
2. Adding the following to my vscode settings file doesn't help:

```json
"[github-actions-workflow]": {
"editor.tabSize": 2,
"editor.insertSpaces": true,
},
```
3. The issue happens with and without GitHub Copilot running

在 VS Code 中使用 github-actions-workflow 语言模式和报告中所示的 YAML 工作流重现该问题，尤其是包含 env: 或 with: 的步骤。比较在这些映射之后按 Enter 和 Tab 时的缩进。完成标准是后续步骤属性仍与前面的 name 行保持对齐，就像文件使用 yaml 语言模式时一样。

由索引模型根据 Issue 内容生成。