Dev: Upgrade Go compiler

This is required to correctly generate docs using latest library type comments.

For example, the doc here [1] will only be added to `time.Location` type if the
Kommentaar container is using the latest compiler version.

Related to:
Teamwork/projectsapigo#9197
https://github.com/Teamwork/projectsapigo/actions/runs/8279682137/job/22655306455?pr=9197

[1] https://github.com/golang/go/blob/go1.22.1/src/time/zoneinfo.go?name=release#L20-L22

.github/workflows/go.yml

@@ -20,7 +20,7 @@ jobs:
 
     - uses: actions/setup-go@v5
       with:
-        go-version: "1.20"
+        go-version: "1.22"
 
     - uses: actions/checkout@v4
       with:

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.20-alpine
+FROM golang:1.22-alpine
 
 VOLUME /code
 VOLUME /config

go.mod

@@ -1,6 +1,6 @@
 module github.com/teamwork/kommentaar
 
-go 1.20
+go 1.22
 
 require (
 	github.com/imdario/mergo v0.3.13

go.sum

@@ -13,6 +13,7 @@ github.com/teamwork/utils/v2 v2.0.1/go.mod h1:a2xpeXNKXYgxY/3UMMXhBy5SJ03dT7xRC0
 golang.org/x/mod v0.10.0 h1:lFO9qtOdlre5W1jxS3r/4szv2/6iXxScdzjoBMXNhYk=
 golang.org/x/mod v0.10.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
 golang.org/x/sync v0.1.0 h1:wsuoTGHzEhffawBOhz5CYhcrV4IdKZbEyZjBMuTp12o=
+golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.7.0 h1:3jlCCIQZPdOYu1h8BkNvLz8Kgwtae2cagcG/VamtZRU=
 golang.org/x/sys v0.7.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/text v0.9.0 h1:2sjJmO8cDvYveuX97RDLsxlyUxLl+GHoLxBiRdHllBE=