Avoid duplication of tools list

[ericcornelissen]

Relates to #36, #160

Summary

Find a way to avoid the duplication of the list of tools between .tool-versions:

js-regex-security-scanner/.tool-versions

Lines 3 to 7 in 2e6b66f

	actionlint 1.6.22
	grype 0.54.0
	shellcheck 0.9.0
	syft 0.63.0
	yamllint 1.28.0

and nightly.yml:

js-regex-security-scanner/.github/workflows/nightly.yml

Lines 26 to 30 in 2e6b66f

	- actionlint
	- grype
	- shellcheck
	- syft
	- yamllint