Fix rst header

Author: henrymercer

docs/codeql/codeql-cli/publishing-and-using-codeql-packs.rst

@@ -74,7 +74,7 @@ The ``analyze`` command will run the default suite of any specified CodeQL packs
    codeql <database> analyze <scope>/<pack> <scope>/<other-pack>
 
 Working with CodeQL packs on GitHub Enterprise Server
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+-----------------------------------------------------
 
 .. pull-quote::