Bump osgeo/proj from 9.8.0 to 9.8.1 in /scripts (#52)

Bumps [osgeo/proj](https://github.com/OSGeo/PROJ) from 9.8.0 to 9.8.1.
- [Release notes](https://github.com/OSGeo/PROJ/releases)
- [Changelog](https://github.com/OSGeo/PROJ/blob/master/ChangeLog)
- [Commits](OSGeo/PROJ@9.8.0...9.8.1)

---
updated-dependencies:
- dependency-name: osgeo/proj
  dependency-version: 9.8.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

scripts/Dockerfile

@@ -1,4 +1,4 @@
-FROM ghcr.io/osgeo/proj:9.8.0
+FROM ghcr.io/osgeo/proj:9.8.1
 
 ARG PYPROJ_VERSION 3.3.0
 ENV PYPROJ_VERSION=$PYPROJ_VERSION