Update QuartoNotebookRunner.jl to 0.12.3

A couple of bug fixes are included in this upgrade:

- Fix printing of colour in console output from cells
- Correct PNG image size metadata
- Fix rendering of `PrettyTables.jl` tables

Author: MichaelHatherly

src/resources/julia/Project.toml

@@ -2,4 +2,4 @@
 QuartoNotebookRunner = "4c0109c6-14e9-4c88-93f0-2b974d3468f4"
 
 [compat]
-QuartoNotebookRunner = "=0.12.1"
+QuartoNotebookRunner = "=0.12.3"