ci: link libm in the SQLite package probe

FTS5 calls log(), which Linux provides in libm rather than libc.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Author: chrispader

scripts/sqlite-package-config.test.ts

@@ -322,6 +322,8 @@ int main(int argc, char **argv) {
       probe,
       '-o',
       binary,
+      // FTS5 calls log(), which Linux provides in libm.
+      '-lm',
     ])
     assert.equal(
       execFileSync(binary, [join(directory, 'rtree.sqlite')], {