Update a few Doxygen @since tags.
diff --git a/instance.c b/instance.c
index 64fed53..5f48b71 100644
--- a/instance.c
+++ b/instance.c
@@ -192,7 +192,7 @@
  *
  * @return SRD_OK upon success, a (negative) error code otherwise.
  *
- * @since 0.1.0
+ * @since 0.3.0
  */
 SRD_API int srd_inst_channel_set_all(struct srd_decoder_inst *di,
 		GHashTable *new_channels, int unit_size)