Bump testsuite/rdf-tests from `b9277b2` to `634dadc`

Bumps [testsuite/rdf-tests](https://github.com/w3c/rdf-tests) from `b9277b2` to `634dadc`.
- [Release notes](https://github.com/w3c/rdf-tests/releases)
- [Commits](b9277b28c7...634dadcedb)

Signed-off-by: dependabot[bot] <support@github.com>

testsuite/rdf-tests

@@ -1 +1 @@
-Subproject commit b9277b28c7aa264bb146095b714873c22220ed57
+Subproject commit 634dadcedba0177eb47975d642ae66949774834a