Add No Cache

Signed-off-by: Patrick Niebeling <patrick.niebeling@adacor.com>

Stable2.0/hooks/build

@@ -12,6 +12,7 @@ IMAGE_NAME=docker-rspamd
 zip -r config
 
 docker build \
+  --no-cache \
   --build-arg VERSION=${VERSION} \
   --build-arg COMMIT=$(git ls-remote --tags -q https://github.com/rspamd/rspamd | sed -n "s/^\([[:xdigit:]]\{40\}\)[[:blank:]]refs\/tags\/${VERSION}^{}$/\1/p" |  xargs git rev-parse --short) \
   --build-arg BRANCH=$(git rev-parse --abbrev-ref HEAD) \