bug#43306: roffit is missing a dependency

[raingloom]

```
Can't locate HTML/Entities.pm in @INC (you may need to install the
HTML::Entities module) (@INC contains:
/gnu/store/8zvc5mvk0xm3ygrxsgpyy5ilxb5rzjry-perl-5.30.2/lib/perl5/site_perl/5.30.2/x86_64-linux-thread-multi
/gnu/store/8zvc5mvk0xm3ygrxsgpyy5ilxb5rzjry-perl-5.30.2/lib/perl5/site_perl/5.30.2
/gnu/store/8zvc5mvk0xm3ygrxsgpyy5ilxb5rzjry-perl-5.30.2/lib/perl5/5.30.2/x86_64-linux-thread-multi
/gnu/store/8zvc5mvk0xm3ygrxsgpyy5ilxb5rzjry-perl-5.30.2/lib/perl5/5.30.2)
at /gnu/store/60054xxdp3y1406xs0zn8vqj9xskh0m9-profile/bin/roffit line
17. BEGIN failed--compilation aborted at
/gnu/store/60054xxdp3y1406xs0zn8vqj9xskh0m9-profile/bin/roffit line 17.
```

I tried adding perl-html-parser to its inputs, but it didn't solve it.