Enable self-hosted 6.2 compiler build

Author: finagolfin

.github/workflows/pull_request.yml

@@ -28,10 +28,10 @@ jobs:
        fail-fast: false
        matrix:
          include:
-           #- swift-version: 'swift-6.2-branch'
-           #  build-type: 'docker'
-           #  build-compiler: '1'
-           #  runner: 'self-hosted'
+           - swift-version: 'swift-6.2-branch'
+             build-type: 'docker'
+             build-compiler: '1'
+             runner: 'self-hosted'
            #- swift-version: 'development'
            #  build-type: 'docker'
            #  build-compiler: '1'