fix(text): Render ol and ul inside blockquote correctly

[kesara]

Fixes #1148

[kesara]

Compare text_results/20240820 (text diff for published RFCs compared with xml2rfc 3.22.0) and text_results/20240820_10472185344 (text diff for published RFCs compared with this branch) in https://github.com/kesara/puhul/

Changes I see are:

$ diff -r text_results/20240820 text_results/20240820_10472185344
diff -r text_results/20240820/rfc9109.diff.txt text_results/20240820_10472185344/rfc9109.diff.txt
1c1,3
< 432d431
---
> 246a247
> >    |
> 432d432
3c5
< 443d441
---
> 443d442
5c7
< 454d451
---
> 454d452
diff -r text_results/20240820/rfc9131.diff.txt text_results/20240820_10472185344/rfc9131.diff.txt
1c1,3
< 1103d1102
---
> 688a689
> >    |
> 1103d1103
Only in text_results/20240820_10472185344: rfc9499.diff.txt