s/ceph_version/local_ceph_version/ for clarity

Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>

PVE/CephConfig.pm

@@ -267,7 +267,7 @@ my $ceph_version_parser = sub {
     warn "Could not parse Ceph version: '$ceph_version'\n";
 };
 
-sub ceph_version {
+sub local_ceph_version {
     my ($cache) = @_;
 
     my $version_string = $cache;