latex rendering of "/" is incorrect, which affects figure axis labels

[AshtonSBradley]

Great to see #1952 happen. Lower case Greek now renders italic!

However, there is a new issue for axis labels related to the update (that I have so far noticed) and forwardslash: for example 2\pi/\xi

gets rendered as

instead of $2\pi/\xi$, or 0.0/\omega becomes

instead of

$0.0/\omega$, with CairoMakie v0.8.3

A simple hack to fix this is to add some horizontal space after the "/" e.g. x/a --> x/\;\;\;a

versioninfo()
Julia Version 1.8.0-beta3
Commit 3e092a2521 (2022-03-29 15:42 UTC)
Platform Info:
  OS: macOS (arm64-apple-darwin21.3.0)
  CPU: 10 × Apple M1 Max
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-13.0.1 (ORCJIT, apple-m1)
  Threads: 8 on 8 virtual cores
Environment:
  JULIA_PKG_DEVDIR = /Users/abradley/Dropbox/Julia/Dev
  JULIA_NUM_THREADS = 8
  JULIA_REVISE_WORKER_ONLY = 1