simpler lost+found pattern

the **/ is not required and currently also mistakenly
doesn't match /lost+found which is probably buggy on the
pathpatterns crate side and needs fixing there

Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>

src/pxar/create.rs

@@ -161,7 +161,7 @@ where
 
     if skip_lost_and_found {
         patterns.push(MatchEntry::parse_pattern(
-            "**/lost+found",
+            "lost+found",
             PatternFlag::PATH_NAME,
             MatchType::Exclude,
         )?);