Bump pdf2image from 1.16 to 1.16.3

Bumps [pdf2image](https://github.com/Belval/pdf2image) from 1.16 to 1.16.3.
- [Release notes](https://github.com/Belval/pdf2image/releases)
- [Commits](Belval/pdf2image@v1.16.0...v.1.16.3)

---
updated-dependencies:
- dependency-name: pdf2image
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -1,4 +1,4 @@
-pdf2image==1.16
+pdf2image==1.16.3
 opencv-python==4.6.0.66
 loguru==0.6.0
 zxingmod==0.19