dnsdist: Update to version 1.9.8

dnsdist: Update to version 1.9.8

- Update from version 1.9.7 to 1.9.8
- Update of rootfile not required
- Changelog
    1.9.8
	Improvements
	    Add the ability to load a given TLS tickets key
	    References: pull request 14877
	    Custom metrics: better error messages, small doc improvements
	    References: pull request 14978
	    Add elapsed time to dq object (@phonedph1)
	    References: pull request 14887
	Bug Fixes
	    setTicketsKeyAddedHook: pass a std::string to the hook to avoid luawrapper
	     to truncate content at potential null chars
	    References: pull request 14878
	    Fix ECS zero-scope caching with incoming DoH queries
	    References: #14959, pull request 14977
	    Allow resetting setWeightedBalancingFactor() to zero
	    References: pull request 14929

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>