Bump elasticsearch from 6.8.13 to 6.8.15 in /dna2poem/elasticsearch/2.0/exmple-plugin#6

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dependabot/maven/dna2poem/elasticsearch/2.0/exmple-plugin/org.elasticsearch-elasticsearch-6.8.15dna2github/dna2oldmemory:dependabot/maven/dna2poem/elasticsearch/2.0/exmple-plugin/org.elasticsearch-elasticsearch-6.8.15Copy head branch name to clipboard