Update pandoc-crossref version in freeze file for pandoc 3.5

Pandoc-crossref 0.3.17.* didn't expect pandoc 3.5.

Author: tarleb

ubuntu/freeze/pandoc-3.5.project.freeze

@@ -197,7 +197,7 @@ constraints: any.Cabal ==3.8.1.0,
              any.pandoc ==3.5,
              pandoc +embed_data_files,
              pandoc-cli +lua -nightly +server,
-             any.pandoc-crossref ==0.3.17.1,
+             any.pandoc-crossref ==0.3.18.0,
              pandoc-crossref -enable_flaky_tests,
              any.pandoc-lua-engine ==0.3.3,
              any.pandoc-lua-marshal ==0.2.9,
@@ -331,4 +331,4 @@ constraints: any.Cabal ==3.8.1.0,
              zip-archive -executable,
              any.zlib ==0.7.1.0,
              zlib -bundled-c-zlib +non-blocking-ffi +pkg-config
-index-state: hackage.haskell.org 2024-10-07T05:41:40Z
+index-state: hackage.haskell.org 2025-07-04T14:10:45Z