Update header for v2.6 #9

	name: ShellCheck
	on: [push]

	jobs:
	shellcheck:
	name: Shellcheck
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- name: Run ShellCheck
	uses: ludeeus/action-shellcheck@master
	# SC2086 (info): Double quote to prevent globbing and word splitting.
	# SC2068 (error): Double quote array expansions to avoid re-splitting elements. [SC2068]
	# SC2006 (style): Use $(...) notation instead of legacy backticks `...`
	# SC3043 (warning): In POSIX sh, 'local' is undefined.
	# https://stackoverflow.com/questions/18597697/posix-compliant-way-to-scope-variables-to-a-function-in-a-shell-script#answer-18600920
	# SC2046 (warning): Quote this to prevent word splitting.
	# SC2003 (style): expr is antiquated. Consider rewriting this using $((..)), ${} or [[ ]].
	# SC3037 (warning): In POSIX sh, echo flags are undefined.
	# SC2181 (note): Check exit code directly with e.g. 'if ! mycmd;', not indirectly with $?.
	# SC2010 (warning): Don't use ls \| grep. Use a glob or a for loop with a condition to allow non-alphanumeric filenames.
	# SC3040 (warning): In POSIX sh, set option pipefail is undefined.
	# SC1091 (note): Not following: [FILEPATH] was not specified as input (see shellcheck -x).
	# We don't want to follow the optional config files here
	env:
	SHELLCHECK_OPTS: -e SC2068 -e SC2086 -e SC2006 -e SC3043 -e SC2046 -e SC2003 -e SC3037 -e SC2181 -e SC2010 -e SC3040 -e SC1091
	with:
	scandir: './'

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