chore: update toolchain to go1.22.3 (#1688)

## Checklist

- [x] I have read the [contribution
guidelines](https://github.com/ooni/probe-cli/blob/master/CONTRIBUTING.md)
- [x] reference issue for this pull request:
ooni/probe#2841
- [ ] if you changed anything related to how experiments work and you
need to reflect these changes in the ooni/spec repository, please link
to the related ooni/spec pull request: <!-- add URL here -->
- [ ] if you changed code inside an experiment, make sure you bump its
version number

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## Description

This diff updates the go toolchain to `1.22.3`

go.mod

@@ -2,7 +2,7 @@ module github.com/ooni/probe-cli/v3
 
 go 1.21.0
 
-toolchain go1.22.2
+toolchain go1.22.3
 
 require (
 	filippo.io/age v1.2.1