Change update gafferpy workflow

[t92549]

Now that gaffer-tools is being archived in favour of the new standalone gafferpy repo, the release action should be updated to trigger a version update in the new repo:

Gaffer/.github/workflows/release.yaml

Lines 216 to 223 in b8fd95d

	- name: Update gaffer-tools' Gaffer version
	uses: benc-uk/workflow-dispatch@v1
	with:
	workflow: Update Gaffer Version
	repo: gchq/gaffer-tools
	token: ${{ secrets.ADMIN_GITHUB_TOKEN }}
	inputs: '{ "version": "${{ env.RELEASE_VERSION }}" }'
	ref: develop