doc: Fix the Doxygen section endings

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
diff --git a/include/osmocom/core/bitvec.h b/include/osmocom/core/bitvec.h
index c2422e6..9c000d0 100644
--- a/include/osmocom/core/bitvec.h
+++ b/include/osmocom/core/bitvec.h
@@ -65,6 +65,6 @@
 int bitvec_find_bit_pos(const struct bitvec *bv, unsigned int n, enum bit_value val);
 int bitvec_spare_padding(struct bitvec *bv, unsigned int up_to_bit);
 
-/*! }@ */
+/*! @} */
 
 #endif /* _BITVEC_H */