fix(deps): update module github.com/valyala/fasthttp to v1.50.0 (#1060)

[![Mend
Renovate](https://app.renovatebot.com/images/banner.svg)](https://renovatebot.com)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [github.com/valyala/fasthttp](https://togithub.com/valyala/fasthttp) |
require | minor | `v1.49.0` -> `v1.50.0` |

---

### Release Notes

<details>
<summary>valyala/fasthttp (github.com/valyala/fasthttp)</summary>

###
[`v1.50.0`](https://togithub.com/valyala/fasthttp/releases/tag/v1.50.0)

[Compare
Source](https://togithub.com/valyala/fasthttp/compare/v1.49.0...v1.50.0)

- [`8cc5539`](8cc5539) Fix
various request timeout issues (Erik Dubbelboer)
- [`34e7da1`](34e7da1)
Allow connection close for custom streams
([#&#8203;1603](https://togithub.com/valyala/fasthttp/issues/1603))
(Armin Becher)
- [`8236f8d`](8236f8d)
fasthttpproxy: fix doc examples (Oleksandr Redko)
- [`4ec5c5a`](4ec5c5a)
docs: fix typos in comments and tests (Oleksandr Redko)
- [`9aa666e`](9aa666e)
Enable gocritic linter; fix lint issues
([#&#8203;1612](https://togithub.com/valyala/fasthttp/issues/1612))
(Oleksandr Redko)

</details>

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined),
Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you
are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

This PR has been generated by [Mend
Renovate](https://www.mend.io/free-developer-tools/renovate/). View
repository job log
[here](https://developer.mend.io/github/go-skynet/LocalAI).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzNi44My4wIiwidXBkYXRlZEluVmVyIjoiMzYuODMuMCIsInRhcmdldEJyYW5jaCI6Im1hc3RlciJ9-->

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

go.mod

@@ -29,7 +29,7 @@ require (
 	github.com/sashabaranov/go-openai v1.15.3
 	github.com/tmc/langchaingo v0.0.0-20230910230029-9c8845b2b019
 	github.com/urfave/cli/v2 v2.25.7
-	github.com/valyala/fasthttp v1.49.0
+	github.com/valyala/fasthttp v1.50.0
 	google.golang.org/grpc v1.58.1
 	google.golang.org/protobuf v1.31.0
 	gopkg.in/yaml.v2 v2.4.0