Update toolchain in docusaurus CI config #8230

Job	Run time
Rust Tests (ubuntu-latest)	4m 42s
Compiler output check (ubuntu-latest)	4m 16s
Build Rust Compiler (ubuntu-latest)	4m 58s
Rust Tests (macos-latest)	3m 17s
Compiler output check (macos-latest)	3m 37s
Build Rust Compiler (ubuntu-latest)	5m 43s
Rust Tests (windows-latest)	6m 52s
Build Rust Compiler (macos-latest)	2m 56s
Build Rust Compiler (macos-latest)	2m 52s
JS Lint	1m 2s
Build Rust Compiler (windows-latest)	9m 48s
JS Tests (Node 18.x)	1m 28s
JS Tests (Node 20.x)	1m 29s
Rust Lint	14s
Flow Typecheck	36s
VSCode Extension Lint	18s
Publish to NPM	1m 29s
	55m 37s

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