Log Message:
tree-sitter-heex: update to 0.7.0.

    Support HEEx expressions {...} within the body of a tag, thanks \ 
@kevinschweikert and @jonatanklosko!
    Support NEEx template highlighting, thanks @bcardarella!
    Separate ending expressions from beginning/middle expressions, thanks \ 
@the-mikedavis and @dvic!
    Enable query constants for Rust projects, thanks @knoebber!
    Documentation fixes, thanks @the-mikedavis!
    Remove unnecessary conflicts from grammar, thanks @amaanq!
    Dependency updates, thanks @SomeoneToIgnore!
    Add MIT license