Handle actions itself in the dependabot updates

[niklassiemer]

I just saw the update of action version itself in https://github.com/dependabot/demo and I think this is a nice idea to do!

[github-actions]

👈 Launch a binder notebook on branch pyiron/pyiron_workflow/dependabot_the_actions

[github-actions]

Pull Request Test Coverage Report for Build 6967060899

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 86.195%

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Totals
Change from base Build 6932358478:	0.0%
Covered Lines:	3328
Relevant Lines:	3861

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💛 - Coveralls

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
✅ +0.00% (target: -1.00%)	∅

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (45737b6)	1986	1563	78.70%
Head commit (fae107c)	1986 (+0)	1563 (+0)	78.70% (+0.00%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#88)	0	0	∅ (not applicable)

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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