Upgrade the module version to 1.22.2

How to categorize this PR?

/kind enhancement

What this PR does / why we need it: Right now, dependabot fails to create a version bump for gardener/gardener with:

updater | 2024/04/09 19:08:47 INFO <job_812251957> Handled error whilst updating github.com/gardener/gardener: dependency_file_not_resolvable {:message=>"go: loading module retractions for github.com/gardener/gardener@v0.32.0: module github.com/gardener/gardener@v1.92.0 requires go >= 1.22.2 (running go 1.22.1; GOTOOLCHAIN=local+auto)"}

In https://github.com/gardener/gardener-extension-registry-cache/pull/177, I missed to update the go module version to go 1.22.2.

When you bump the gardener/gardener version to v1.92.0 locally and then run make tidy, the go tool is able to deal with it and to upgrade the module version to 1.22.2:

% make tidy
go: module github.com/gardener/gardener@v1.92.0 requires go >= 1.22.2; switching to go1.22.2
go: upgraded go 1.22.1 => 1.22.2
# ...

Which issue(s) this PR fixes: I hope that upgrading the go module version will resolve the dependabot failure.

Special notes for your reviewer: N/A

Release note:

NONE

gardener / gardener-extension-registry-cache

Upgrade the module version to 1.22.2 #179