[bitrise] Allow workflow-level tool overrides (SchemaStore#4954)

Author: ofalvai

src/schemas/json/bitrise.json

@@ -862,6 +862,9 @@
         "priority": {
           "$ref": "#/definitions/PriorityModel"
         },
+        "tools": {
+          "$ref": "#/definitions/ToolsModel"
+        },
         "meta": {
           "patternProperties": {
             ".*": {