vendor: update github.com/cyphar/filepath-securejoin to v0.3.3

This fixes issues we had with spurious MkdirAll failures.

Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>

vendor/github.com/cyphar/filepath-securejoin/join.go

@@ -22,27 +22,27 @@ const maxSymlinkLimit = 255
 
 // IsNotExist tells you if err is an error that implies that either the path
 // accessed does not exist (or path components don't exist). This is
-// effectively a more broad version of os.IsNotExist.
+// effectively a more broad version of [os.IsNotExist].
 func IsNotExist(err error) bool {
 	// Check that it's not actually an ENOTDIR, which in some cases is a more
 	// convoluted case of ENOENT (usually involving weird paths).
 	return errors.Is(err, os.ErrNotExist) || errors.Is(err, syscall.ENOTDIR) || errors.Is(err, syscall.ENOENT)
 }
 
-// SecureJoinVFS joins the two given path components (similar to Join) except
+// SecureJoinVFS joins the two given path components (similar to [filepath.Join]) except
 // that the returned path is guaranteed to be scoped inside the provided root
 // path (when evaluated). Any symbolic links in the path are evaluated with the
 // given root treated as the root of the filesystem, similar to a chroot. The
-// filesystem state is evaluated through the given VFS interface (if nil, the
-// standard os.* family of functions are used).
+// filesystem state is evaluated through the given [VFS] interface (if nil, the
+// standard [os].* family of functions are used).
 //
 // Note that the guarantees provided by this function only apply if the path
 // components in the returned string are not modified (in other words are not
 // replaced with symlinks on the filesystem) after this function has returned.
-// Such a symlink race is necessarily out-of-scope of SecureJoin.
+// Such a symlink race is necessarily out-of-scope of SecureJoinVFS.
 //
 // NOTE: Due to the above limitation, Linux users are strongly encouraged to
-// use OpenInRoot instead, which does safely protect against these kinds of
+// use [OpenInRoot] instead, which does safely protect against these kinds of
 // attacks. There is no way to solve this problem with SecureJoinVFS because
 // the API is fundamentally wrong (you cannot return a "safe" path string and
 // guarantee it won't be modified afterwards).
@@ -123,8 +123,8 @@ func SecureJoinVFS(root, unsafePath string, vfs VFS) (string, error) {
 	return filepath.Join(root, finalPath), nil
 }
 
-// SecureJoin is a wrapper around SecureJoinVFS that just uses the os.* library
-// of functions as the VFS. If in doubt, use this function over SecureJoinVFS.
+// SecureJoin is a wrapper around [SecureJoinVFS] that just uses the [os].* library
+// of functions as the [VFS]. If in doubt, use this function over [SecureJoinVFS].
 func SecureJoin(root, unsafePath string) (string, error) {
 	return SecureJoinVFS(root, unsafePath, nil)
 }