print/ruby-pdf-reader: update to 2.9.1

2.8.0 (2021-12-28)

* Add PDF::Reader::Page#runs for extracting text from a page with
  positioning metadata (http://github.com/yob/pdf-reader/pull/411)
* Add options to PDF::Reader::Page#text to make some behaviour configurable
  (http://github.com/yob/pdf-reader/pull/411)
- including extracting the text for only part of the page
* Improve text positioning and extraction for Type3 fonts
  (http://github.com/yob/pdf-reader/pull/412)
* Skip extracting text that is positioned outside the page
  (http://github.com/yob/pdf-reader/pull/413)
* Fix occasional crash when reading some streams
  (http://github.com/yob/pdf-reader/pull/405)

2.9.0 (2022-01-24)

* Support additional encryption standards
  (http://github.com/yob/pdf-reader/pull/419)
* Return CropBox correctly from Page#rectangles
  (https://github.com/yob/pdf-reader/pull/420)
* For sorbet users, additional type annotations are included in the gem

2.9.1 (2022-02-04)

* Fix exception in Page#walk introduced in 2.9.0
  (http://github.com/yob/pdf-reader/pull/442)
* Other small bug fixes

(taca)