build(deps): bump pymupdf from 1.26.3 to 1.26.7

Bumps [pymupdf](https://github.com/pymupdf/pymupdf) from 1.26.3 to 1.26.7.
- [Release notes](https://github.com/pymupdf/pymupdf/releases)
- [Changelog](https://github.com/pymupdf/PyMuPDF/blob/main/changes.txt)
- [Commits](pymupdf/PyMuPDF@1.26.3...1.26.7)

---
updated-dependencies:
- dependency-name: pymupdf
  dependency-version: 1.26.7
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

requirements.txt

@@ -18,7 +18,7 @@ jsonschema==4.22.0
 schema==0.7.7
 rdflib==6.3.2
 smart_open==7.0.4
-PyMuPDF==1.26.3
+PyMuPDF==1.26.7
 defusedxml==0.7.1
 zipstream-ng==1.8.0