ci: Use the shared soundness workflow from swiftlang/github-workflows (…

…#20)

### Motivation

`swiftlang/github-workflows` is the final home for the shared soundness workflows which started in `apple/swift-nio`.

### Modifications

Use the soundness workflow from `swiftlang/github-workflows`.
Fix complaints from the new YAML linter step.

### Result

We will pull the shared workflow from the correct final location, so we will continue to receive updates.

### Test Plan

CI continues to pass.

.github/workflows/pull_request.yml

@@ -2,12 +2,12 @@ name: PR
 
 on:
  pull_request:
- types: [opened, reopened, synchronize]
+  types: [opened, reopened, synchronize]
 
 jobs:
  soundness:
  name: Soundness
- uses: apple/swift-nio/.github/workflows/soundness.yml@main
+ uses: swiftlang/github-workflows/.github/workflows/soundness.yml@main
  with:
  api_breakage_check_container_image: "swift:6.0-noble"
  docs_check_container_image: "swift:6.0-noble"
@@ -31,25 +31,25 @@ jobs:
  registry:
  image: registry:2
  ports:
- - 5000:5000
+  - 5000:5000
  container:
  image: swift:6.0-noble
  steps:
- - name: Checkout repository
- uses: actions/checkout@v4
- with:
- persist-credentials: false
+  - name: Checkout repository
+  uses: actions/checkout@v4
+  with:
+  persist-credentials: false
 
- - name: Mark the workspace as safe
- # https://github.com/actions/checkout/issues/766
- run: git config --global --add safe.directory ${GITHUB_WORKSPACE}
+  - name: Mark the workspace as safe
+  # https://github.com/actions/checkout/issues/766
+  run: git config --global --add safe.directory ${GITHUB_WORKSPACE}
 
- - name: Run test job
- env:
- REGISTRY_HOST: registry
- REGISTRY_PORT: 5000
- run: |
- swift test
+  - name: Run test job
+  env:
+  REGISTRY_HOST: registry
+  REGISTRY_PORT: 5000
+  run: |
+  swift test
 
  swift-6-language-mode:
  name: Swift 6 Language Mode

.spi.yml

@@ -1,6 +1,6 @@
 version: 1
 builder:
  configs:
- - documentation_targets:
- - containertool
- - ContainerImageBuilderPlugin
+  - documentation_targets:
+  - containertool
+  - ContainerImageBuilderPlugin