Clarify lighttpd image is pre-release

Author: kad-korpem

Dockerfile

@@ -135,7 +135,7 @@ RUN mkdir /usr/local/src/mapserver/build && \
     make install && \
     ldconfig
 
-#local image lighttpd build from https://github.com/PDOK/lighttpd-docker/tree/PDOK-14748_mapserver_8
+# pre-release image lighttpd build from https://github.com/PDOK/lighttpd-docker/tree/PDOK-14748_mapserver_8
 # TODO use definitive lighttpd image
 FROM pdok/lighttpd:1.4.67-bookworm-rc1 AS service