Update dependency prom-client to v15 #552

Job	Run time
Generate Rules Strategy	7s
Generate Image Strategy	2s
Extract registries from registry secret mapping	8s
Lint nodejs's Dockerfile	4s
Lint reactphp's Dockerfile	4s
Lint random's Dockerfile	3s
Build nodejs Docker	14s
Build reactphp Docker	19s
Build random Docker	15s
Scan nodejs for vulnerabilities	23s
Scan reactphp for vulnerabilities	21s
Scan random for vulnerabilities	13s
Test nodejs against customHosts	1m 9s
Test nodejs against customHostsHttp	1m 5s
Test nodejs against nonWwwToWww	1m 9s
Test nodejs against nonWwwToWwwHttp	1m 4s
Test nodejs against wwwToNonWww	1m 4s
Test nodejs against wwwToNonWwwHttp	1m 9s
Test reactphp against customHosts	1m 7s
Test reactphp against customHostsHttp	1m 5s
Test reactphp against nonWwwToWww	1m 7s
Test reactphp against nonWwwToWwwHttp	1m 6s
Test reactphp against wwwToNonWww	1m 20s
Test reactphp against wwwToNonWwwHttp	1m 5s
Test random against customHosts	1m 5s
Test random against customHostsHttp	1m 4s
Test random against nonWwwToWww	1m 3s
Test random against nonWwwToWwwHttp	1m 3s
Test random against wwwToNonWww	1m 3s
Test random against wwwToNonWwwHttp	1m 3s
Push ${{ matrix.image }} to ${{ matrix.registry }}	0s
	22m 4s

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