Unify alphavanzage tooltip

gnucash/gschemas/org.gnucash.GnuCash.general.finance-quote.gschema.xml.in

@@ -3,7 +3,7 @@
     <key name="alphavantage-api-key" type="s">
       <default>''</default>
       <summary>Alpha Vantage API key</summary>
-      <description>Alpha Vantage requires an API key to use their service. You can obtain a key by registering for a free account at the Alpha Vantage website, https://alphavantage.co/support/#api-key.</description>
+      <description>Alpha Vantage requires an API key to use their service. You can obtain a key by registering for a free account at the Alpha Vantage website, https://www.alphavantage.co/support/#api-key.</description>
     </key>
     <key name="yhfinance-api-key" type="s">
       <default>''</default>

gnucash/gtkbuilder/dialog-preferences.glade

@@ -3671,7 +3671,7 @@ many months before the current month</property>
                   <object class="GtkEntry" id="pref/general.finance-quote/alphavantage-api-key">
                     <property name="visible">True</property>
                     <property name="can-focus">True</property>
-                    <property name="tooltip-text" translatable="yes">Alpha Vantage requires an API key to use their service. You can obtain a key by registering for a free account at the Alpha Vantage website, https://alphavantage.co/support/#api-key.</property>
+                    <property name="tooltip-text" translatable="yes">Alpha Vantage requires an API key to use their service. You can obtain a key by registering for a free account at the Alpha Vantage website, https://www.alphavantage.co/support/#api-key.</property>
                     <property name="hexpand">True</property>
                   </object>
                   <packing>