fix(deps): update github.com/tmc/langchaingo digest to 1e2a401 (#948)

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [github.com/tmc/langchaingo](https://togithub.com/tmc/langchaingo) |
require | digest | `fef0821` -> `1e2a401` |

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go.mod

@@ -27,7 +27,7 @@ require (
 	github.com/phayes/freeport v0.0.0-20220201140144-74d24b5ae9f5
 	github.com/rs/zerolog v1.30.0
 	github.com/sashabaranov/go-openai v1.14.2
-	github.com/tmc/langchaingo v0.0.0-20230818002435-fef08210d974
+	github.com/tmc/langchaingo v0.0.0-20230826022619-1e2a401097d6
 	github.com/urfave/cli/v2 v2.25.7
 	github.com/valyala/fasthttp v1.48.0
 	google.golang.org/grpc v1.57.0