The dollar sign used to indicate a variable is incorrectly flagged as a prompt in a code block

A $ sign preceded by " might often indicate a variable rather than a command prompt.

For example:

```
export PATH="$PATH:/home/user/snap/multipass/common/bin"
```

Locate the Vale rule that flags dollar signs as command prompts and reproduce the warning with the provided export PATH example. Check the rule's existing tests or fixtures, then verify that a dollar sign inside a quoted variable assignment is accepted while the intended prompt cases remain flagged.

Written by the indexing model from the issue text.