Update Dockerfile with jsonc commit hash

docker/code-analysis/Dockerfile

@@ -92,6 +92,7 @@ RUN \
       cd /opt/dev && \
       git clone https://github.com/json-c/json-c.git && \
       cd json-c && \
+      git checkout 9021cdcdd01fc9dbcbe1f06391848c2ac915212f && \
       cmake . && \
       make && \
       make install && \