CI: Use double quotes for sed command with bash variable

Dockerfile

@@ -28,7 +28,7 @@ COPY eos-docker/xrootd-fwd-proxy.cfg /etc/xrootd/
 
 # Set correct path for the dependency repository based on the EOS version
 # which is being built
-RUN sed -i 's/__EOS_CODENAME__/${EOS_CODENAME}/g' /etc/yum.repos.d/eos.repo
+RUN sed -i "s/__EOS_CODENAME__/${EOS_CODENAME}/g" /etc/yum.repos.d/eos.repo
 
 RUN mkdir /var/tmp/eosxd-cache/ /var/tmp/eosxd-journal/
 RUN adduser eos-user

Dockerfile_asan

@@ -28,7 +28,7 @@ COPY eos-docker/xrootd-fwd-proxy.cfg /etc/xrootd/
 
 # Set correct path for the dependency repository based on the EOS version
 # which is being built
-RUN sed -i 's/__EOS_CODENAME__/${EOS_CODENAME}/g' /etc/yum.repos.d/eos.repo
+RUN sed -i "s/__EOS_CODENAME__/${EOS_CODENAME}/g" /etc/yum.repos.d/eos.repo
 
 RUN mkdir /var/tmp/eosxd-cache/ /var/tmp/eosxd-journal/
 

Dockerfile_c8

@@ -28,7 +28,7 @@ COPY eos-docker/xrootd-fwd-proxy.cfg /etc/xrootd/
 
 # Set correct path for the dependency repository based on the EOS version
 # which is being built
-RUN sed -i 's/__EOS_CODENAME__/${EOS_CODENAME}/g' /etc/yum.repos.d/eos.repo
+RUN sed -i "s/__EOS_CODENAME__/${EOS_CODENAME}/g" /etc/yum.repos.d/eos.repo
 
 RUN mkdir /var/tmp/eosxd-cache/ /var/tmp/eosxd-journal/
 

Dockerfile_no_sse

@@ -28,7 +28,7 @@ COPY eos-docker/xrootd-fwd-proxy.cfg /etc/xrootd/
 
 # Set correct path for the dependency repository based on the EOS version
 # which is being built
-RUN sed -i 's/__EOS_CODENAME__/${EOS_CODENAME}/g' /etc/yum.repos.d/eos.repo
+RUN sed -i "s/__EOS_CODENAME__/${EOS_CODENAME}/g" /etc/yum.repos.d/eos.repo
 
 RUN mkdir /var/tmp/eosxd-cache/ /var/tmp/eosxd-journal/