upgrade prometheus client-go

Signed-off-by: zackzhangkai <zackzhang@yunify.com>

vendor/github.com/prometheus/procfs/internal/fs/fs.go

@@ -25,6 +25,9 @@ const (
 
 	// DefaultSysMountPoint is the common mount point of the sys filesystem.
 	DefaultSysMountPoint = "/sys"
+
+	// DefaultConfigfsMountPoint is the common mount point of the configfs
+	DefaultConfigfsMountPoint = "/sys/kernel/config"
 )
 
 // FS represents a pseudo-filesystem, normally /proc or /sys, which provides an