Bump the gdx group with 5 updates

Bumps the gdx group with 5 updates:

| Package | From | To |
| --- | --- | --- |
| [com.badlogicgames.gdx:gdx-backend-lwjgl3](https://github.com/libgdx/libgdx) | `1.12.1` | `1.13.0` |
| [com.badlogicgames.gdx:gdx-freetype-platform](https://github.com/libgdx/libgdx) | `1.12.1` | `1.13.0` |
| [com.badlogicgames.gdx:gdx](https://github.com/libgdx/libgdx) | `1.12.1` | `1.13.0` |
| [com.badlogicgames.gdx:gdx-platform](https://github.com/libgdx/libgdx) | `1.12.1` | `1.13.0` |
| [com.badlogicgames.gdx:gdx-backend-headless](https://github.com/libgdx/libgdx) | `1.12.1` | `1.13.0` |


Updates `com.badlogicgames.gdx:gdx-backend-lwjgl3` from 1.12.1 to 1.13.0
- [Release notes](https://github.com/libgdx/libgdx/releases)
- [Changelog](https://github.com/libgdx/libgdx/blob/master/CHANGES)
- [Commits](libgdx/libgdx@1.12.1...1.13.0)

Updates `com.badlogicgames.gdx:gdx-freetype-platform` from 1.12.1 to 1.13.0
- [Release notes](https://github.com/libgdx/libgdx/releases)
- [Changelog](https://github.com/libgdx/libgdx/blob/master/CHANGES)
- [Commits](libgdx/libgdx@1.12.1...1.13.0)

Updates `com.badlogicgames.gdx:gdx` from 1.12.1 to 1.13.0
- [Release notes](https://github.com/libgdx/libgdx/releases)
- [Changelog](https://github.com/libgdx/libgdx/blob/master/CHANGES)
- [Commits](libgdx/libgdx@1.12.1...1.13.0)

Updates `com.badlogicgames.gdx:gdx-platform` from 1.12.1 to 1.13.0
- [Release notes](https://github.com/libgdx/libgdx/releases)
- [Changelog](https://github.com/libgdx/libgdx/blob/master/CHANGES)
- [Commits](libgdx/libgdx@1.12.1...1.13.0)

Updates `com.badlogicgames.gdx:gdx-backend-headless` from 1.12.1 to 1.13.0
- [Release notes](https://github.com/libgdx/libgdx/releases)
- [Changelog](https://github.com/libgdx/libgdx/blob/master/CHANGES)
- [Commits](libgdx/libgdx@1.12.1...1.13.0)

Updates `com.badlogicgames.gdx:gdx-freetype-platform` from 1.12.1 to 1.13.0
- [Release notes](https://github.com/libgdx/libgdx/releases)
- [Changelog](https://github.com/libgdx/libgdx/blob/master/CHANGES)
- [Commits](libgdx/libgdx@1.12.1...1.13.0)

Updates `com.badlogicgames.gdx:gdx` from 1.12.1 to 1.13.0
- [Release notes](https://github.com/libgdx/libgdx/releases)
- [Changelog](https://github.com/libgdx/libgdx/blob/master/CHANGES)
- [Commits](libgdx/libgdx@1.12.1...1.13.0)

Updates `com.badlogicgames.gdx:gdx-platform` from 1.12.1 to 1.13.0
- [Release notes](https://github.com/libgdx/libgdx/releases)
- [Changelog](https://github.com/libgdx/libgdx/blob/master/CHANGES)
- [Commits](libgdx/libgdx@1.12.1...1.13.0)

Updates `com.badlogicgames.gdx:gdx-backend-headless` from 1.12.1 to 1.13.0
- [Release notes](https://github.com/libgdx/libgdx/releases)
- [Changelog](https://github.com/libgdx/libgdx/blob/master/CHANGES)
- [Commits](libgdx/libgdx@1.12.1...1.13.0)

---
updated-dependencies:
- dependency-name: com.badlogicgames.gdx:gdx-backend-lwjgl3
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: gdx
- dependency-name: com.badlogicgames.gdx:gdx-freetype-platform
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: gdx
- dependency-name: com.badlogicgames.gdx:gdx
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: gdx
- dependency-name: com.badlogicgames.gdx:gdx-platform
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: gdx
- dependency-name: com.badlogicgames.gdx:gdx-backend-headless
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: gdx
- dependency-name: com.badlogicgames.gdx:gdx-freetype-platform
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: gdx
- dependency-name: com.badlogicgames.gdx:gdx
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: gdx
- dependency-name: com.badlogicgames.gdx:gdx-platform
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: gdx
- dependency-name: com.badlogicgames.gdx:gdx-backend-headless
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: gdx
...

Signed-off-by: dependabot[bot] <[email protected]>

gradle/libs.versions.toml

@@ -1,5 +1,5 @@
 [versions]
-libgdx = "1.12.1"
+libgdx = "1.13.0"
 gdx-vfx = "0.5.4"
 logback = "1.5.10"
 junit-platform = "1.11.2"