Prevent endless loop when setting deprecated `jekyllDataString` (renderer) prototype #3023

Job	Run time
Style check (Line length)	42s
Style check (Python)	12s
Style check (Markdown)	43s
Style check (Lua)	48s
Style check (Bash)	7s
Style check (Tabs and spaces)	4s
Type check (Python)	27s
Build Docker image (latest)	15m 11s
Test Docker image (latest)	38m 47s
Automatically merge pull request	3s
Publish Docker image	0s
Publish artefacts and create a prerelease	0s
	57m 4s

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