added gdal UDF example to docs (#579) #1869

	name: build main
	on:
	push:
	branches-ignore:
	- "R/**"
	- "r/**"
	- "python/**"
	- "scala/**"
	pull_request:
	branches:
	- "**"
	jobs:
	build:
	runs-on: ubuntu-22.04
	env:
	GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
	strategy:
	matrix:
	python: [ 3.10.12 ]
	numpy: [ 1.22.4 ]
	gdal: [ 3.4.1 ]
	spark: [ 3.4.1 ]
	R: [ 4.2.2 ]
	steps:
	- name: checkout code
	uses: actions/checkout@v2
	- name: build scala
	uses: ./.github/actions/scala_build
	- name: build python
	uses: ./.github/actions/python_build
	- name: build R
	uses: ./.github/actions/r_build
	- name: upload artefacts
	uses: ./.github/actions/upload_artefacts

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