One more link fix

Author: edwardalee

docs/reference/target-language-details.mdx

@@ -2915,7 +2915,7 @@ These also help to illustrate how to incorporate your own libraries.
 - Audio file reader: [wave_file_reader.h](https://www.lf-lang.org/reactor-c/wave__file__reader_8h.html)
 - A double-ended queue: [deque.h](https://www.lf-lang.org/reactor-c/deque_8h.html)
 - A hashmap implementation: [hashmap.h](https://www.lf-lang.org/reactor-c/hashmap_8h.html) (with a [specialization for pointers](https://www.lf-lang.org/reactor-c/pointer__hashmap_8h.html))
-- A hashset implementation: [hashset.h](https://www.lf-lang.org/reactor-c/hashset_8h.html) (with a [hashset_iterator](https://www.lf-lang.org/reactor-c/hashset__iterator_8h.html))
+- A hashset implementation: [hashset.h](https://www.lf-lang.org/reactor-c/hashset_8h.html) (with a [hashset_iterator](https://www.lf-lang.org/reactor-c/hashset__itr_8h.html))
 - An ncurses terminal interface for I/O: [sensor_simulator.h](https://www.lf-lang.org/reactor-c/sensor__simulator_8h.html)
 
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