Move code signing into production.

.github/workflows/packaging.yml

@@ -132,7 +132,7 @@ jobs:
           api-token: '${{ secrets.SIGNPATH_API_TOKEN }}'
           organization-id: '${{ secrets.SIGNPATH_ORGANISATION_ID }}'
           project-slug: 'OpenRA'
-          signing-policy-slug: 'test-signing'
+          signing-policy-slug: 'release-signing'
           github-artifact-id: '${{ steps.unsigned-artifact.outputs.artifact-id }}'
           wait-for-completion: true
           output-artifact-directory: 'build/windows/signed/'

README.md

@@ -55,3 +55,6 @@ available to you under the terms of the GNU General Public License
 as published by the Free Software Foundation, either version 3 of
 the License, or (at your option) any later version. For more
 information, see [COPYING](https://github.com/OpenRA/OpenRA/blob/bleed/COPYING).
+
+# Sponsors
+Free code signing on Windows provided by [SignPath.io](https://about.signpath.io/), certificate by [SignPath Foundation](https://signpath.org/).