fix: updated escape syntax docs on release create

[benPearce1]

After:

❯ octopus release create --help
Create a release in Octopus Deploy

USAGE
 octopus release create [flags]

FLAGS
 -p, --project string              Name or ID of the project to create the release in
 -c, --channel string              Name or ID of the channel to use
 -r, --git-ref string              Git Reference e.g. refs/heads/main. Only relevant for config-as-code projects
     --git-commit string           Git Commit Hash; Specify this in addition to Git Reference if you want to reference a commit other than the latest for that branch/tag.
     --package-version string      Default version to use for all Packages
     --release-notes string        Release notes to attach
     --release-notes-file string   Release notes to attach (from file)
 -v, --version string              Override the Release Version
 -x, --ignore-existing             If a release with the same version exists, do nothing instead of failing.
     --ignore-channel-rules        Allow creation of a release where channel rules would otherwise prevent it.
     --package stringArray         Version specification for a specific package. You may specify this multiple times.
                                   Format as {package}:{version}, {step}:{version} or {package-ref-name}:{packageOrStep}:{version}
                                   If the package ID or step name contains a colon, slash, or equals sign (such as Maven coordinates like com.example:my-artifact), escape that character with a backslash:
                                        --package "com.example\:my-artifact:1.0"
                                   This escape syntax requires Octopus CLI 2.21.2 or later and Octopus Server 2026.2.10450 or later.
     --git-resource stringArray    Git reference for a specific Git resource.
                                   Format as {step}:{git-ref}, {step}:{git-resource-name}:{git-ref}
                                   You may specify this multiple times
     --custom-field stringArray    Custom field value to set on the release.
                                   Format as {name}:{value}. You may specify multiple times

INHERITED FLAGS
 -h, --help                   Show help for a command
     --no-prompt              Disable prompting in interactive mode
 -f, --output-format string   Specify the output format for a command ("json", "table", or "basic") (default "table")
 -s, --space string           Specify the space for operations

EXAMPLE
 octopus release create --project MyProject --channel Beta --version 1.2.3
 octopus release create -p MyProject -c Beta -v 1.2.3
 octopus release create -p MyProject -c default --package "utils:1.2.3" --package "utils:InstallOnly:5.6.7"
 octopus release create -p MyProject --package "com.example\:my-artifact:1.0"
 octopus release create -p MyProject -c Beta --no-prompt