Add Debian 13 Trixie

Co-authored-by: Andrew Murray <3112309+radarhere@users.noreply.github.com>

Author: hugovk

debian-13-trixie-amd64/Dockerfile

@@ -83,4 +83,4 @@ RUN cd /depends && ./install_imagequant.sh && ./install_libavif.sh && ./install_
 USER pillow
 CMD ["depends/test.sh"]
 
-#docker run -v $GITHUB_WORKSPACE:/Pillow pythonpillow/debian-12-trixie-amd64
+#docker run -v $GITHUB_WORKSPACE:/Pillow pythonpillow/debian-13-trixie-amd64

debian-13-trixie-x86/Dockerfile

@@ -84,4 +84,4 @@ USER pillow
 ENTRYPOINT ["linux32"]
 CMD ["depends/test.sh"]
 
-#docker run -v $GITHUB_WORKSPACE:/Pillow pythonpillow/debian-12-trixie-x86
+#docker run -v $GITHUB_WORKSPACE:/Pillow pythonpillow/debian-13-trixie-x86