ci: Run workflows against 5.x.x branches (#859)

## Description
This PR will run the workflows (excluding phpstan) on the 5.x.x branch

## Related Issue
#841
#857

## Type of Change
- [X] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- [ ] Documentation update
- [ ] Code refactoring
- [ ] Other (please describe):

## Checklist

<!-- Mark completed items with an "x" -->

- [X] I have read the [CONTRIBUTING](CONTRIBUTING.md) guidelines
- [X] My code follows the code style of this project
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [ ] All new and existing tests pass
- [ ] I have updated the documentation accordingly
- [X] My changes generate no new warnings

## Additional Notes

This should allow the run of workflows for #857 and future PR's against
the 5.x.x branch

Author: DannyvdSluijs

.github/workflows/continuous-integration-32-bits.yml

@@ -4,9 +4,11 @@ on:
   push:
     branches:
       - main
+      - 5.x.x
   pull_request:
     branches:
       - main
+      - 5.x.x
 
 env:
   COMPOSER_FLAGS: "--ansi --no-interaction --no-progress --prefer-dist"

.github/workflows/continuous-integration.yml

@@ -4,9 +4,11 @@ on:
   push:
     branches:
       - main
+      - 5.x.x
   pull_request:
     branches:
       - main
+      - 5.x.x
 
 env:
   COMPOSER_FLAGS: "--ansi --no-interaction --no-progress --prefer-dist"

.github/workflows/lint.yml

@@ -7,6 +7,7 @@ on:
   pull_request:
     branches:
       - main
+      - 5.x.x
 
 jobs:
   lint:

.github/workflows/style-check.yml

@@ -4,9 +4,11 @@ on:
   push:
     branches:
       - main
+      - 5.x.x
   pull_request:
     branches:
       - main
+      - 5.x.x
 
 jobs:
   style-check:

CHANGELOG.md

@@ -6,6 +6,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Changed
+- ci: Run workflows against 5.x.x branches ([#859](https://github.com/jsonrainbow/json-schema/pull/859))
 
 ## [6.6.3] - 2025-12-02
 ### Changed