github/coverity: switch to building with json-c instead of yajl

Switch the json library used by the Coverity runs.

Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Jason Andryuk <jason.andryuk@amd.com>
Release-Acked-by: Oleksii Kurochko <oleksii.kurochko@gmail.com>

.github/workflows/coverity.yml

@@ -20,9 +20,9 @@ jobs:
           iasl \
           libbz2-dev \
           libext2fs-dev \
+          libjson-c-dev \
           liblzma-dev \
           libncurses5-dev \
-          libyajl-dev \
           libzstd-dev \
           ocaml \
           ocaml-findlib \