fixup! Replace deprecated ENV key value and LABEL key value syntax

Dockerfile

@@ -8,7 +8,7 @@ ARG BASE_OSG_SERIES=23
 ARG BASE_OS=el9
 
 FROM opensciencegrid/software-base:$BASE_OSG_SERIES-$BASE_OS-$BASE_YUM_REPO AS xcache
-LABEL maintainer=OSG Software <[email protected]>
+LABEL maintainer="OSG Software <[email protected]>"
 
 # Previous arg has gone out of scope
 ARG BASE_YUM_REPO=testing
@@ -70,7 +70,7 @@ WORKDIR /var/spool/xrootd
 ################
 
 FROM xcache AS atlas-xcache
-LABEL maintainer=OSG Software <[email protected]>
+LABEL maintainer="OSG Software <[email protected]>"
 
 # Specify the base Yum repository to get the necessary RPMs
 ARG BASE_YUM_REPO=testing
@@ -97,7 +97,7 @@ RUN mkdir -p /var/log/xrootd/atlas-xcache && \
 ##############
 
 FROM xcache AS cms-xcache
-LABEL maintainer=OSG Software <[email protected]>
+LABEL maintainer="OSG Software <[email protected]>"
 
 ARG BASE_YUM_REPO=testing
 
@@ -127,7 +127,7 @@ EXPOSE 1094
 ###############
 
 FROM xcache AS stash-cache
-LABEL maintainer=OSG Software <[email protected]>
+LABEL maintainer="OSG Software <[email protected]>"
 
 ARG BASE_YUM_REPO=testing
 
@@ -164,7 +164,7 @@ EXPOSE 8000
 
 
 FROM xcache AS stash-origin
-LABEL maintainer=OSG Software <[email protected]>
+LABEL maintainer="OSG Software <[email protected]>"
 
 # Specify the base Yum repository to get the necessary RPMs
 ARG BASE_YUM_REPO=testing