Bump solr-core from 5.3.1 to 8.4.0 in /9781484210710/APRESS_BUNDLE/solr-practical-approach#1
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dependabot[bot] wants to merge 1 commit intomasterfrom dependabot/maven/9781484210710/APRESS_BUNDLE/solr-practical-approach/org.apache.solr-solr-core-8.4.0
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