Fix embedding in new YAML grammar

[RedCMD]

VSCode is adopting a new YAML grammar
microsoft/vscode#224978

Injecting into nested block maps doesn't work fully anymore
this is because the new grammar captures the prefixing whitespace, disallowing this injection to capture the newline ^

Workaround is to change ^ to (^|\\G)

extended-embedded-languages/utilities/syntax_templates/yaml_syntax.js

Line 29 in c128e89

'begin': String.raw`^([ ]+)(?! )`,

nested:
  test: | #js
    console.log("hello world")

Install VSCode 1.92.0, the insiders build or the new grammar
Make sure no other YAML extension is installed (Red Hat's etc)

[RedCMD]

@ruschaaf VSCode is looking at re-adding the new YAML grammar again in the upcoming Sep 4th release
microsoft/vscode#180523 (comment)

[ruschaaf]

Thanks for the fix, looking forward to the new grammar too

[RedCMD]

Sorry, my bad
\\G should have been \G, which expands to \\G in the JSON (not \\\\G)