GH Actions workflows multiple "OneOf" is true (SchemaStore#2465)

* fix issue SchemaStore#2463 GH Actions workflows

two items in OneOff is true. thats is why IntelliJ give error.
"$ref": "..." must be without other keyword in draft 04..07

* add test file mentioned in issue SchemaStore#2463

src/schemas/json/github-workflow.json

@@ -225,11 +225,11 @@
           }
         },
         {
-          "$ref": "#/definitions/expressionSyntax",
+          "type": "string",
           "pattern": "^\\$\\{\\{\\s*(secrets|inputs)\\s*\\}\\}$"
         },
         {
-          "$ref": "#/definitions/expressionSyntax",
+          "type": "string",
           "$comment": "https://docs.github.com/en/actions/learn-github-actions/expressions#fromjson",
           "pattern": "^\\$\\{\\{\\s*fromJSON\\(.*\\)\\s*\\}\\}$"
         }

src/test/github-workflow/issue_2463_file_1.yaml

@@ -0,0 +1,31 @@
+name: "Example workflow for schema store"
+
+on:
+  push:
+    branches:
+      - "**"
+
+jobs:
+  vulnerabilities:
+    name: Example workflow for schema store
+    runs-on: ubuntu-latest
+    steps:
+      - name: Setup ssh keys
+        env:
+          TEST_VALUE_5: ${{ secrets.TEST_VALUE_5 }}
+          TEST_VALUE_6: ${{ secrets.TEST_VALUE_6 }}
+        run: |-
+          # Just some fake commands
+          apt-get update
+          apt-get install -y vim
+      - name: Cache composer
+        uses: actions/cache@v3
+        with:
+          path: ~/.composer/cache
+          key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}
+          restore-keys: ${{ runner.os }}-composer-
+env:
+  TEST_VALUE_1: ${{ secrets.TEST_VALUE_1 }}
+  TEST_VALUE_2: ${{ secrets.TEST_VALUE_2 }}
+  TEST_VALUE_3: "TEST VALUE 3"
+  TEST_VALUE_4: ${{ secrets.TEST_VALUE_4 }}