Stale recognized ruby versions

### Is there an existing issue for this?

- [x] I have searched the existing issues

### Package ecosystem

bundler

### Package manager version

_No response_

### Language version

Ruby 3.3.10

### Manifest location and content before the Dependabot update

# /Gemfile
ruby '~> 3.3.10'

### dependabot.yml content
```
version: 2
updates:
- package-ecosystem: 'bundler'
directory: '/'
schedule:
interval: 'daily'
cooldown:
default-days: 7
open-pull-requests-limit: 5
labels:
- 'dependencies'
- 'ruby'
groups:
ruby-minor-patch:
update-types:
- 'minor'
- 'patch'

- package-ecosystem: 'npm'
directory: '/'
schedule:
interval: 'daily'
cooldown:
default-days: 7
open-pull-requests-limit: 5
labels:
- 'dependencies'
- 'javascript'
groups:
npm-minor-patch:
update-types:
- 'minor'
- 'patch'

- package-ecosystem: 'github-actions'
directory: '/'
schedule:
interval: 'weekly'
day: 'monday'
time: '03:00'
timezone: 'Europe/Riga'
groups:
github-actions:
patterns:
- '*'
open-pull-requests-limit: 3
labels:
- 'dependencies'
- 'github-actions'
```

### Updated dependency

_No response_

### What you expected to see, versus what you actually saw

Recently noticed that my bundler gems were not being updated at all.

What I expected: dependabot to create gem upgrade PRs

What I actually saw, when looking at the dependency graph:

```
Dependabot does not support your ruby version
Dependabot detected the following ruby requirement for your project: '~> 3.3.10'.

Currently, the following ruby versions are supported in Dependabot: 1.8.7, 1.9.3, 2.0.0, 2.1.10, 2.2.10, 2.3.8, 2.4.10, 2.5.9, 2.6.9, 2.7.6, 3.0.6, 3.1.6, 3.2.8, 3.3.8, 3.4.8.
```

Ruby 3.2, 3.3, 3.4 specify stale versions, have not checked for the others

### Native package manager behavior

_No response_

### Images of the diff or a link to the PR, issue, or logs

_No response_

### Smallest manifest that reproduces the issue
```
source 'https://rubygems.org'
ruby '~> 3.3.10'
```