fix: update turbo-types with concurrency option (#10379)

### Description

This is a follow-up fix to:
#10236

Unfortunately I didn't notice `turbo-types` is where the schema actually
lives and is generated from, so the configuration schema never got
updated to support this option.

### Testing Instructions

1. Install turborepo 2.5.1
2. Add a "concurrency" option to your `turbo.json`
3. Observe that using the public schema URL in `$schema` flags the
concurrency option as an unknown property.
4. Clone this branch
5. Change the path in `$schema` to point to the schema in this branch
6. Observe the previous warning goes away.

Author: kade-robertson

packages/turbo-types/schemas/schema.json

@@ -69,6 +69,11 @@
           "description": "Enable use of the UI for `turbo`.\n\nDocumentation: https://turborepo.com/docs/reference/configuration#ui",
           "default": "stream"
         },
+        "concurrency": {
+          "type": "string",
+          "description": "Set/limit the maximum concurrency for task execution. Must be an integer greater than or equal to `1` or a percentage value like `50%`.\n\n - Use `1` to force serial execution (one task at a time).  - Use `100%` to use all available logical processors.\n\nDocumentation: https://turborepo.com/docs/reference/configuration#concurrency",
+          "default": "10"
+        },
         "dangerouslyDisablePackageManagerCheck": {
           "type": "boolean",
           "description": "Disable check for `packageManager` in root `package.json`\n\nThis is highly discouraged as it leaves `turbo` dependent on system configuration to infer the correct package manager.\n\nSome turbo features are disabled if this is set to true.",

packages/turbo-types/schemas/schema.v2.json

@@ -69,6 +69,11 @@
           "description": "Enable use of the UI for `turbo`.\n\nDocumentation: https://turborepo.com/docs/reference/configuration#ui",
           "default": "stream"
         },
+        "concurrency": {
+          "type": "string",
+          "description": "Set/limit the maximum concurrency for task execution. Must be an integer greater than or equal to `1` or a percentage value like `50%`.\n\n - Use `1` to force serial execution (one task at a time).  - Use `100%` to use all available logical processors.\n\nDocumentation: https://turborepo.com/docs/reference/configuration#concurrency",
+          "default": "10"
+        },
         "dangerouslyDisablePackageManagerCheck": {
           "type": "boolean",
           "description": "Disable check for `packageManager` in root `package.json`\n\nThis is highly discouraged as it leaves `turbo` dependent on system configuration to infer the correct package manager.\n\nSome turbo features are disabled if this is set to true.",

packages/turbo-types/src/types/config-v2.ts

@@ -123,6 +123,18 @@ export interface RootSchema extends BaseSchema {
    */
   ui?: UI;
 
+  /**
+   * Set/limit the maximum concurrency for task execution. Must be an integer greater than or equal to `1` or a percentage value like `50%`.
+   *
+   *  - Use `1` to force serial execution (one task at a time).
+   *  - Use `100%` to use all available logical processors.
+   *
+   * Documentation: https://turborepo.com/docs/reference/configuration#concurrency
+   *
+   * @defaultValue `"10"`
+   */
+  concurrency?: string;
+
   /**
    * Disable check for `packageManager` in root `package.json`
    *