fix: Use `json` file extension for log files #1854

Job	Run time
Select target helm repository based on action trigger	3s
Check if committed Helm charts are up to date	1m 1s
Run Cargo Udeps	2m 3s
Run Rustfmt	22s
Check if committed README is the one we would render from the available parts	26s
Run RustDoc	1m 15s
Run Clippy	30s
Run Cargo Deny (advisories)	25s
Run Cargo Deny (bans licenses sources)	31s
Run Cargo Tests	32s
All tests passed	3s
Package Charts, Build Docker Image and publish them - ubicloud-standard-8-arm	11m 12s
Package Charts, Build Docker Image and publish them - ubuntu-latest	12m 41s
Build and publish manifest list	44s
Run the OpenShift Preflight check on the published images	21s
	32m 9s

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