restrict date regex to only valid months; fixes #310 #361

	name: Regression test
	on:
	pull_request:
	branches:
	- main
	workflow_dispatch:
	jobs:
	regress:
	runs-on: ubuntu-latest
	steps:
	- name: Clone Github Repo Action
	uses: actions/checkout@v4
	- name: Setup apptainer
	uses: eWaterCycle/[email protected]
	- name: Get container from cache
	id: cache-sif
	uses: actions/cache@v3
	with:
	path: .singularity/image.sif
	key: ${{ hashFiles('container.def', 'bin/.container-tag') }}
	- name: Get gems and node files from cache
	id: cache-bundle-npm
	uses: actions/cache@v3
	with:
	path: \|
	.home/.gems
	node_modules
	key: ${{ hashFiles('Gemfile.lock') }}-${{ hashFiles('package-lock.json') }}
	- if: ${{ steps.cache-sif.outputs.cache-hit != 'true' }}
	name: Build container
	run: ./bin/build_container
	- name: Setup project
	run: ./bin/setup
	- name: Run regression
	run: ./do regress

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