Disable io_uring in arch-repo-manager

On the server I'm still getting crashes:

```
terminate called after throwing an instance of 'boost::wrapexcept<boost::system::system_error>'
  what():  io_uring_queue_init: Cannot allocate memory [system:12]
```

arch-repo-manager/git/PKGBUILD

@@ -49,7 +49,7 @@ build() {
     -DBUILD_SHARED_LIBS:BOOL=ON \
     -DDUMMY_BUILD_ACTION_ENABLED:BOOL=ON \
     -DREFLECTION_GENERATOR_EXECUTABLE:FILEPATH='/usr/bin/reflective_rapidjson_generator-git' \
-    -DBOOST_ASIO_IO_URING:BOOL=ON \
+    -DBOOST_ASIO_IO_URING:BOOL=OFF \
     .
   VERBOSE=1 ninja
 }