updated names

app.py

@@ -54,13 +54,13 @@ with st.form(key='columns_in_form', clear_on_submit = False):
     st.markdown('Pre-print server')
     checks = st.columns(4)
     with checks[0]:
-        ArXiv_check = st.checkbox('ArXiv')
+        ArXiv_check = st.checkbox('arXiv')
     with checks[1]:
-        ChemArXiv_check = st.checkbox('ChemArXiv')
+        ChemArXiv_check = st.checkbox('chemRxiv')
     with checks[2]:
-        BioArXiv_check = st.checkbox('BioArXiv')
+        BioArXiv_check = st.checkbox('bioRxiv')
     with checks[3]:
-        MedrXiv_check = st.checkbox('MedrXiv')  
+        MedrXiv_check = st.checkbox('medRxiv')  
 
     searchButton = st.form_submit_button(label = 'Search')