nvme: use non-capturing group for 0x

fixes issues on systems where namespace is not yet prefixed by 0x

plugins/disk/nvme

@@ -89,7 +89,7 @@ None known.
 
 =head1 VERSION
 
-  1.1
+  1.2
 
 =head1 AUTHOR
 
@@ -176,7 +176,7 @@ sub nvme_list {
         } elsif (m:^Node\s+Generic\s+SN\s+Model\s+Namespace\s+Usage\s+:) {
             # version 2 header
             ++$recognised_output;
-        } elsif (m:^(/\S+)\s+(/\S+)\s+(\S+)\s+(\S.*\S)\s{3,}((0x)?\d+)\s+(\S+\s+.B)\s+/\s+(\S+\s+.B):) {
+        } elsif (m|^(/\S+)\s+(/\S+)\s+(\S+)\s+(\S.*\S)\s{3,}((?:0x)?\d+)\s+(\S+\s+.B)\s+/\s+(\S+\s+.B)|) {
             # version 2 data (first 2 columns start with /)
             $devices{'SN_'.$3} = {
                 device    => $1,