Fix CQL names that were colored as keywords or commands

[eric-schneider]

Summary

Updates the vendored CQL grammar to the latest highlightjs-cql. A review of the DataStax Enterprise examples, and of examples that span several lines, found names colored as keywords or as cqlsh commands:

• Column names that match cqlsh commands. In a statement that spans lines, a line can start with a column called consistency, source, or copy. These were colored as cqlsh commands, and their types lost their color.
• Names after TO. A role called role (GRANT ... TO role) and the new name in RENAME ... TO are now names.
• DSE Search schema paths. field[@name='x'] paths, the field name after ADD FIELD or DROP FIELD, and dotted settings such as config.queryExecutorThreads are now names.

lowerCaseString in ADD lowerCaseString is now colored as a keyword, as the DSE docs describe it.

How to review

Compare these pages on the draft docs site with production:

Page	What to look for
Set up database auditing (DSE 6.9)	In the audit_log schema, consistency and source look like the other columns, and their text types are colored.
ALTER SEARCH INDEX SCHEMA (CQL command reference, DSE 6.9)	In DROP field comment, comment isn't a keyword.
Configuring search index joins (CQL docs, DSE 6.9)	In SET field[@name='_partitionKey'], field isn't a keyword.
Enabling multi-threaded queries (DSE 6.9)	config.queryExecutorThreads is one name.
Using LowerCaseStrField with search indexes (DSE 6.9)	lowerCaseString is a keyword.
Configuring Apache Spark nodes (DSE 5.1)	In GRANT ALL ON REMOTE OBJECT DseResourceManager TO role and the DseClientTool example after it, role isn't a keyword.

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