chore(deps): Update dependency go to v1.23.1 (#74)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [go](https://go.dev/)
([source](https://redirect.github.com/golang/go)) | toolchain | patch |
`1.23.0` -> `1.23.1` |

---

### Release Notes

<details>
<summary>golang/go (go)</summary>

###
[`v1.23.1`](https://redirect.github.com/golang/go/compare/go1.23.0...go1.23.1)

</details>

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go.mod

@@ -2,7 +2,7 @@ module github.com/cerbos/cerbos-sdk-go
 
 go 1.22
 
-toolchain go1.23.0
+toolchain go1.23.1
 
 require (
 	github.com/bufbuild/protovalidate-go v0.6.5

tools/go.mod

@@ -2,7 +2,7 @@ module github.com/cerbos/cerbos-sdk-go/tools
 
 go 1.22.1
 
-toolchain go1.23.0
+toolchain go1.23.1
 
 require (
 	github.com/golangci/golangci-lint v1.60.3