git: 390c31c4289e - main - meta.sys.mk: downgrade missing Filemon error to warning

The branch main has been updated by emaste:

URL: https://cgit.FreeBSD.org/src/commit/?id=390c31c4289e66f1bd9cb2349d6e55fd4dc468f8

commit 390c31c4289e66f1bd9cb2349d6e55fd4dc468f8
Author:     Ed Maste <emaste@FreeBSD.org>
AuthorDate: 2023-04-23 14:48:22 +0000
Commit:     Ed Maste <emaste@FreeBSD.org>
CommitDate: 2023-04-23 14:48:22 +0000

    meta.sys.mk: downgrade missing Filemon error to warning
    
    Cirrus-CI was red because `make makeman` failed with a spurious "filemon
    is not loaded" error.  For now just make it a warning.
---
 share/mk/meta.sys.mk | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/share/mk/meta.sys.mk b/share/mk/meta.sys.mk
index 1fc58a226cb1..7a74ba2d5d21 100644
--- a/share/mk/meta.sys.mk
+++ b/share/mk/meta.sys.mk
@@ -188,7 +188,7 @@ META_NOECHO= :
 UPDATE_DEPENDFILE= NO
 .export UPDATE_DEPENDFILE
 .elif ${_filemon:T} == "filemon" && !exists(${_filemon})
-.error ${.newline}ERROR: The filemon module (${_filemon}) is not loaded.
+.warning ${.newline}ERROR: The filemon module (${_filemon}) is not loaded.
 .endif
 .endif