Channel fails to match the required pattern: /^[a-z\d][a-z\d._-]*$/

### Summary

While attempting a build under the "development-release" profile, an error is encountered due to a pattern mismatch with the specified channel name "feature/custom-build-channel". The error message received is: fails to match the required pattern: /^[a-z\d][a-z\d._-]*$/.

Despite the channel "feature/custom-build-channel" being present in the channel list, direct builds with this channel name result in the mentioned error. This channel name is automatically generated during the eas update process based on the branch title. The current pattern validation seems to restrict the use of forward slashes (/), which are part of the automatically generated channel names, thus preventing the build from proceeding

### Managed or bare?

bare

### Environment

expo-env-info 1.0.5 environment info:
System:
OS: macOS 13.5
Shell: 5.9 - /bin/zsh
Binaries:
Node: 16.16.0 - ~/.nvm/versions/node/v16.16.0/bin/node
Yarn: 1.22.19 - ~/.nvm/versions/node/v16.16.0/bin/yarn
npm: 9.9.0 - ~/Documents/vitable-mobile/node_modules/.bin/npm
Managers:
CocoaPods: 1.12.0 - /Users/[redacted]/.rvm/gems/ruby-2.7.6/bin/pod
SDKs:
iOS SDK:
Platforms: DriverKit 22.1, iOS 16.1, macOS 13.0, tvOS 16.1, watchOS 9.1
IDEs:
Android Studio: 2021.2 AI-212.5712.43.2112.8609683
Xcode: 14.1/14B47b - /usr/bin/xcodebuild
npmPackages:
expo: ^48.0.0 => 48.0.20
react: 18.2.0 => 18.2.0
react-dom: 18.2.0 => 18.2.0
react-native: 0.71.3 => 0.71.3
react-native-web: ~0.18.9 => 0.18.12
npmGlobalPackages:
eas-cli: 3.9.1
expo-cli: 6.0.2
Expo Workflow: bare

### Error output

eas.json is not valid.
- "build.development-release.channel" with value "feature/custom-build-channel" fails to match the required pattern: /^[a-z\d][a-z\d._-]*$/

### Reproducible demo or steps to reproduce from a blank project

create eas.json
create development-release profile on build property
set channel to "feature/custom-build-channel"
eas build --profile "development-release" --platform ios --non-interactive --no-wait;