Update sphinxcontrib-svg2pdfconverter requirement in /requirements (#22)

Updates the requirements on [sphinxcontrib-svg2pdfconverter](https://github.com/missinglinkelectronics/sphinxcontrib-svg2pdfconverter) to permit the latest version.
- [Commits](missinglinkelectronics/sphinxcontrib-svg2pdfconverter@v1.2.0...v1.2.2)

---
updated-dependencies:
- dependency-name: sphinxcontrib-svg2pdfconverter
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements/docs.txt

@@ -5,4 +5,4 @@ furo==2023.9.10
 enum-tools[sphinx]~=0.11.0
 sphinx-design[furo]~=0.5.0
 readthedocs-sphinx-search~=0.3.1
-sphinxcontrib-svg2pdfconverter~=1.2.0
+sphinxcontrib-svg2pdfconverter~=1.2.2