Subproject check does not understand f-strings

[QuLogic]

Describe the bug
In Matplotlib, we have a subproject call that uses an f-string with a version:
https://github.com/matplotlib/matplotlib/blob/main/extern/meson.build#L19-L21
With mesonlsp, this produces a warning:

Unknown subproject `freetype-@LOCAL_FREETYPE_VERSION@`

To Reproduce
Steps to reproduce the behavior:

1. Clone https://github.com/matplotlib/matplotlib
2. Open extern/meson.build
3. Go to line 19
4. See error noted above.

Expected behavior
No warning, as there is a subproject for the evaluated string, i.e. if I replace the substitution with a hard-coded string, then mesonlsp stops complaining.

System info

• OS: Fedora, from your COPR
• Editor: neovim 0.10.0
• Version: 4.3.1

[JCWasmx86]

I implemented it quickly. It works as long as there is only one variable.