Update dependency go to v1.23.5 (#1294)

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

Author: renovate[bot]

go.mod

@@ -2,7 +2,7 @@ module github.com/giantswarm/app-operator/v7
 
 go 1.21
 
-toolchain go1.22.3
+toolchain go1.23.5
 
 require (
 	github.com/Masterminds/semver/v3 v3.3.1