fix: Change header text for components (#3836)

Author: suejung-sentry

src/pages/RepoPage/CoverageTab/ComponentsTab/subroute/ComponentsTable/ComponentsTable.test.tsx

@@ -197,7 +197,7 @@ describe('ComponentsTable', () => {
       const components = await screen.findByText('Components')
       expect(components).toBeInTheDocument()
 
-      const coverage = await screen.findByText('Coverage %')
+      const coverage = await screen.findByText('Last aggregated coverage %')
       expect(coverage).toBeInTheDocument()
 
       const trend = await screen.findByText('Historical Trend')

src/pages/RepoPage/CoverageTab/ComponentsTab/subroute/ComponentsTable/ComponentsTable.tsx

@@ -87,7 +87,7 @@ const columns = [
     cell: ({ renderValue }) => renderValue(),
   }),
   columnHelper.accessor('coverage', {
-    header: () => 'Coverage %',
+    header: () => 'Last aggregated coverage %',
     cell: ({ renderValue }) => renderValue(),
   }),
   columnHelper.accessor('trend', {