Fix profile render when the README.md size is larger than 1024 bytes (#25270)

Backport #25131

tests/integration/api_packages_cargo_test.go

@@ -88,7 +88,7 @@ func testPackageCargo(t *testing.T, _ *neturl.URL) {
 		blob, err := commit.GetBlobByPath(path)
 		assert.NoError(t, err)
 
-		content, err := blob.GetBlobContent()
+		content, err := blob.GetBlobContent(1024)
 		assert.NoError(t, err)
 
 		return content