Embedded variables not highlighted in keyword calls

[weltings]

Describe the bug
Syntax highlighting does not recognize embedded variables in BDD style testing

To Reproduce

*** Test Cases ***

Example test case
    Given A UM-MIG compliant B1 declaration with all mandatory elements
    And Licence is specified with type C068 reference NL0074CDIU0571970 amount 1 and currency EUR
    When The declaration is submitted to EU customs
    Then Message DVV02: Validate Customer Licence should have been received
    And The message should have value JA in element resultaatcode

*** Keywords ***

Licence is specified with type ${type} reference ${reference} amount ${amount} and currency ${currency}
    ${index}=    Get sequence numeric for new SupportingDocument element in section GovernmentAgencyGoodsItem
    In the section GovernmentAgencyGoodsItem an element with tag SupportingDocument has been added
    In the section SupportingDocument[${index}] the element ID has been added with value ${reference}
    In the section SupportingDocument[${index}] the element TypeCode has been added with value ${type}
    In the section SupportingDocument[${index}] the element SequenceNumeric has been added with value ${index}
    In the section SupportingDocument[${index}] an element with tag WriteOff exists
    In the section SupportingDocument[${index}]/WriteOff the element AmountAmount has been added with value ${amount}
    In the section SupportingDocument[${index}]/WriteOff the element AmountAmount has attribute currencyID with value ${currency}

Expected behavior
In keywords section I would expect variables to be highlighted as such

Screenshots

Versions:

• OS: Windows 10
• Robot Framework Version: [4]
• Robot Framework Language Server Version: [0.41.0]
• Client Version: [e.g.: VSCode 1.64.2]