Change category in change note to "majorAnalysis"

Author: owen-mc

java/ql/lib/change-notes/2024-06-14-reverse-dns-separate-threat-model-kind.md

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-category: minorAnalysis
+category: majorAnalysis
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 * We previously considered reverse DNS resolutions (IP address -> domain name) as sources of untrusted data, since compromised/malicious DNS servers could potentially return malicious responses to arbitrary requests. We have now removed this source from the default set of untrusted sources and made a new threat model kind for them, called "reverse-dns".