We use variables in YAML which gets filled afterwards can't use the variables with customTags

Describe the bug

We use Java to build our project (maven) and variables will be put in the YAML file like:

services:
 ${project.artifactId}:
  image: ${project.artifactId}:dev

so the actual file will be genereated in src/target folder with the appropiate name.
I can't save these docker-compose file cause the formatter makes it

services:

    "${project.artifactId}":
        image: ${project.artifactId}:dev

not to mention also putting the JAVA_OPTS from multi-line

   JAVA_TOOL_OPTIONS: "
    -Dencryption.keystore.type=JCEKS
    -Dencryption.cipherAlgorithm=DESede/CBC/PKCS5Padding
    -Dencryption.keyAlgorithm=DESede
    "

Back to 1-line

JAVA_TOOL_OPTIONS: " -Dencryption.keystore.type=JCEKS -Dencryption.cipherAlgorithm=DESede/CBC/PKCS5Padding -Dencryption.keyAlgorithm=DESede"

Expected Behavior

When adding the variable to the settings.json

"yaml.customTags": [ "${project.artifactId}" ],
It should encapsulet them in quotes

Current Behavior

see problem

Steps to Reproduce

1. use the example piece of yaml
2. hit save
3. see the change

Environment

• Windows
• Mac
• Linux
• other (please specify)

Reproduce the formatter behavior with the YAML examples and the yaml.customTags setting described in the issue. Start by tracing the customTags handling in the formatter, then verify that variable-like keys remain valid and the shown multiline JAVA_TOOL_OPTIONS value is preserved as intended.