added some filter descriptions

similarity_page.py

@@ -141,7 +141,7 @@ def show_multi_matching_page():
     st.session_state.crs5_option_disabled = True
     col1, col2, col3 = st.columns([5, 1, 5])
     with col1:
-        st.write("Sector Filter")
+        st.write("Sector Filter (required)")
         st.caption("""
                     Sector filters must be applied to see results. The CRS5 and CRS3 classifications organise development aid into categories, 
                     with the 5-digit level providing more specific detail within the broader 3-digit categories. 
@@ -184,6 +184,13 @@ def show_multi_matching_page():
         query = st.text_input("Search Query")
     
     with col3:
+        st.write("Additional Filters")
+        st.caption("""
+                    The additional filters allow for a more detailed search for the Multi-Project Matching.
+                
+            
+                """)
+
         # COUNTRY SELECTION
         country_option = st.multiselect(
                 'Country / Countries',