[doc] Add symbols to harfbuzz-sections.txt
diff --git a/docs/harfbuzz-sections.txt b/docs/harfbuzz-sections.txt
index d60b1b1..1603999 100644
--- a/docs/harfbuzz-sections.txt
+++ b/docs/harfbuzz-sections.txt
@@ -555,6 +555,7 @@
hb_ot_layout_language_get_required_feature
hb_ot_layout_lookup_collect_glyphs
hb_ot_layout_lookup_get_glyph_alternates
+hb_ot_layout_lookup_get_optical_bound
hb_ot_layout_lookup_substitute_closure
hb_ot_layout_lookups_substitute_closure
hb_ot_layout_lookup_would_substitute
@@ -787,4 +788,6 @@
hb_link_t
hb_object_t
hb_subset_repack_or_fail
+hb_subset_input_pin_axis_location
+hb_subset_input_pin_axis_to_default
</SECTION>
