Replace filing timeline image with new 2026 dates

Author: contolini

src/data-browser/graphs/quarterly/QuarterlyFilingCalendar.jsx

@@ -1,4 +1,4 @@
-import QFilingCal from '../../../documentation/markdown/images/quarterly_filing_2025.png'
+import QFilingCal from '../../../documentation/markdown/images/quarterly_filing_2026.png'
 import { ExpandableSection } from '../../../common/ExpandableSection'
 
 export const QuarterlyFilingCalendar = ({ expanded = false }) => {
@@ -7,7 +7,7 @@ export const QuarterlyFilingCalendar = ({ expanded = false }) => {
       label='Quarterly Filing Calendar'
       expandedByDefault={expanded}
     >
-      <img src={QFilingCal} alt='Quarterly Filing Calendar 2021' />
+      <img src={QFilingCal} alt='Quarterly Filing Calendar' />
     </ExpandableSection>
   )
 }