GitHub actions Workflow syntax highlight issues

Type: Bug

Hi,

The following example code breaks syntax highlight when using `GitHub Actions Workflow` as the selected language:

```yaml
name: Example

on:
push:

jobs:
example:
name: Example
runs-on: ubuntu-latest

strategy:
fail-fast: true
matrix: ${{ fromJSON( startsWith(inputs.linting, '{') && inputs.linting || format('{{"linting":["{0}"]}}', inputs.linting) ) }}

steps:
- run: echo "Example"
```
*edit* added animated gif to report.

Extension version: 0.25.8
VS Code version: Code 1.79.2 (695af097c7bd098fbf017ce3ac85e09bbc5dda06, 2023-06-14T08:58:33.551Z)
OS version: Darwin arm64 22.5.0
Modes:

System Info

|Item|Value|
|---|---|
|CPUs|Apple M1 Pro (10 x 24)|
|GPU Status|2d_canvas: enabled
canvas_oop_rasterization: disabled_off
direct_rendering_display_compositor: disabled_off_ok
gpu_compositing: enabled
metal: disabled_off
multiple_raster_threads: enabled_on
opengl: enabled_on
rasterization: enabled
raw_draw: disabled_off_ok
video_decode: enabled
video_encode: enabled
vulkan: disabled_off
webgl: enabled
webgl2: enabled
webgpu: enabled|
|Load (avg)|4, 5, 5|
|Memory (System)|32.00GB (0.34GB free)|
|Process Argv|--crash-reporter-id 84717786-ecd9-4b5e-a3c9-9b80403c43aa|
|Screen Reader|no|
|VM|0%|

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pynewext54:30695312
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showlangstatbar:30737416
vsctsb:30748421
pythonms35:30701012
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pythonfmttext:30731395
pythoncmv:30756943
fixshowwlkth:30771522
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i26e3531:30769768
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```