kea-dev: Fix pqxx build

Dockerfile.kea-dev

@@ -37,13 +37,13 @@ RUN cd isc-kea-${KEA_VERSION} \
 	&& echo "usr/bin/kea-msg-compiler" >> debian/kea-common.install \
 	&& dpkg-buildpackage -F
 
-RUN git clone --depth 1 https://salsa.debian.org/debian/libpqxx.git libpqxx-debian-sid
+RUN git clone --depth 1 https://salsa.debian.org/debian/libpqxx.git
 
-RUN cd libpqxx-debian-sid \
+RUN cd libpqxx \
 	&& mk-build-deps -i -r -t "apt-get -y -o Debug::pkgProblemResolver=yes --no-install-recommends" \
 	&& rm -f *.deb *.changes *.buildinfo
 
-RUN cd libpqxx-debian-sid \
+RUN cd libpqxx \
 	&& dpkg-buildpackage -F
 
 RUN ls -l && dpkg -i *.deb