chore(deps): update dependency soto-project/soto to v7 (#1152)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [soto-project/soto](https://togithub.com/soto-project/soto) | major |
`from: "6.8.0"` -> `from: "7.0.0"` |

---

### Release Notes

<details>
<summary>soto-project/soto (soto-project/soto)</summary>

###
[`v7.0.0`](https://togithub.com/soto-project/soto/releases/tag/7.0.0)

[Compare
Source](https://togithub.com/soto-project/soto/compare/6.8.0...7.0.0)

Using SotoCore
[7.0.0](https://togithub.com/soto-project/soto-core/releases/tag/7.0.0)

#### Major release changes

- Internals of Soto are now Swift concurrency based and all `EventLoop`
based APIs have been removed.
- Replace `AWSPayload` with `AWSHTTPBody` which can be either a single
`ByteBuffer` or a stream of `ByteBuffers` to store request and response
payloads.
- Decode response headers by passing `ResponseDecodingContainer` which
holds details of raw response to decoder.
- Encode request headers, query parameters by passing
`RequestEncodingContainer` which holds reference to raw request to
encoder.
-   Add support for decoding Event streams.
-   Reduced export of public symbols from SotoSignerV4 and SotoCore.
- SotoXML is imported as implementationOnly so is unavailable outside of
SotoCore.
- Restructure Middleware, new type `AWSMiddlewareProtocol` replaces
`AWSServiceMiddleware`, added `AWSMiddlewareStack` result builder.
-   Require Swift 5.8

#### Minor release changes

-   Use AsyncHTTPClient Swift concurrency based APIs
- Adding `AWSTracingMiddleware` to add basic tracing support to Soto
calls.
-   S3: Multipart upload
- Add support for uploading a single ByteBuffer. PR
[#&#8203;691](https://togithub.com/soto-project/soto/issues/691)
- Add `concurrentUploads` parameter to control how many uploads run at
the same time. PR
[#&#8203;692](https://togithub.com/soto-project/soto/issues/692)
- Remove ` ThreadPoolProvider ` and replace with `NIOThreadPool`
defaulting to `NIOThreadPool.singleton`.
- S3: Add support for concurrent multipart downloads. PR
[#&#8203;705](https://togithub.com/soto-project/soto/issues/705)
- Use async `NonBlockingFileIO` APIs instead of APIs requiring an
`EventLoop`
- Add S3.generatePresignedPost for HTML form based uploads. PR
[#&#8203;710](https://togithub.com/soto-project/soto/issues/710) from
[@&#8203;nicksloan](https://togithub.com/nicksloan)

</details>

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examples/soto_example/Package.swift

@@ -5,6 +5,6 @@ import PackageDescription
 let package = Package(
     name: "PhoneNumberKitExample",
     dependencies: [
-        .package(url: "https://github.com/soto-project/soto.git", from: "6.8.0"),
+        .package(url: "https://github.com/soto-project/soto.git", from: "7.0.0"),
     ]
 )