Update dependency prom-client to v15 #558

Job	Run time
Generate Image Strategy	9s
Generate Rules Strategy	4s
Extract registries from registry secret mapping	3s
Lint nodejs's Dockerfile	7s
Lint reactphp's Dockerfile	5s
Lint random's Dockerfile	3s
Build nodejs Docker	17s
Build reactphp Docker	19s
Build random Docker	24s
Scan nodejs for vulnerabilities	15s
Scan reactphp for vulnerabilities	26s
Scan random for vulnerabilities	18s
Test nodejs against customHosts	1m 3s
Test nodejs against customHostsHttp	1m 10s
Test nodejs against nonWwwToWww	1m 4s
Test nodejs against nonWwwToWwwHttp	1m 4s
Test nodejs against wwwToNonWww	1m 3s
Test nodejs against wwwToNonWwwHttp	1m 4s
Test reactphp against customHosts	1m 6s
Test reactphp against customHostsHttp	1m 6s
Test reactphp against nonWwwToWww	1m 5s
Test reactphp against nonWwwToWwwHttp	1m 13s
Test reactphp against wwwToNonWww	1m 14s
Test reactphp against wwwToNonWwwHttp	1m 6s
Test random against customHosts	1m 5s
Test random against customHostsHttp	1m 12s
Test random against nonWwwToWww	1m 13s
Test random against nonWwwToWwwHttp	1m 13s
Test random against wwwToNonWww	1m 6s
Test random against wwwToNonWwwHttp	1m 5s
Push ${{ matrix.image }} to ${{ matrix.registry }}	0s
	22m 42s

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