fix: nil: Disable clang-format for Local IPv6 Unicast Addresses strings

The LSP server (using clangd) was always complaining about:

    Suspicious string literal, probably missing a comma

for the two Local IPv6 Unicast Addresses strings that spanned
across multiple lines.  Disable clang-format for these two lines.

Merge branch 'ondrej/fix-suspicious-string-literal-probably-missing-comma' into 'main'

See merge request isc-projects/bind9!10764