chore: update to go 1.23 (#409)

### Definition of Ready

- [ ] I am happy with the code
- [ ] Short description of the feature/issue is added in the pr
description
- [ ] PR is linked to the corresponding user story
- [ ] Acceptance criteria are met
- [ ] All open todos and follow ups are defined in a new ticket and
justified
- [ ] Deviations from the acceptance criteria and design are agreed with
the PO and documented.
- [ ] No debug or dead code
- [ ] My code has no repetitions
- [ ] Critical parts are tested automatically
- [ ] Where possible E2E tests are implemented
- [ ] Documentation/examples are up-to-date
- [ ] All non-functional requirements are met
- [ ] Functionality of the acceptance criteria is checked manually on
the dev system.

.github/workflows/release.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-22.04
     strategy:
       matrix:
-        go: ['1.21', '1.22']
+        go: ['1.21', '1.22', '1.23']
     name: Go ${{ matrix.go }} test
     steps:
       - uses: actions/checkout@v4

README.md

@@ -44,8 +44,9 @@ Versions that also build are marked with :warning:.
 | Version | Supported          |
 |---------|--------------------|
 | <1.21   | :x:                |
-| 1.21    | :white_check_mark: |
+| 1.21    | :warning:          |
 | 1.22    | :white_check_mark: |
+| 1.23    | :white_check_mark: |
 
 ## License