FIXME temporarily add sanity check excuse for avro-cpp

Author: stephanlachnit

tools/sanity_checks.py

@@ -428,7 +428,7 @@ def check_source_url(self, name: str, wrap_section: configparser.SectionProxy, v
             segs = version.split('.')
             self.assertEqual(len(segs), 3)
             version = segs[0] + segs[1] + segs[2]
-        elif name in {'netstring-c', 'directxmath', 'luajit'}:
+        elif name in {"netstring-c", "directxmath", "luajit", "avro-cpp"}:
             # There is no specific version for netstring-c
             # DirectXMath source url contains only tag name without version
             # LuaJIT source URL does not contain the version number.