Bump xu-cheng/texlive-full from 20230401 to 20230501 in /.devcontainer

Bumps [xu-cheng/texlive-full](https://github.com/xu-cheng/latex-docker) from 20230401 to 20230501.
- [Release notes](https://github.com/xu-cheng/latex-docker/releases)
- [Commits](https://github.com/xu-cheng/latex-docker/commits)

---
updated-dependencies:
- dependency-name: xu-cheng/texlive-full
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.devcontainer/Dockerfile

@@ -1,4 +1,4 @@
-FROM ghcr.io/xu-cheng/texlive-full:20230401
+FROM ghcr.io/xu-cheng/texlive-full:20230501
 WORKDIR /doc
 RUN apk update \
     && apk add git make \