adjust post-release and win-exe workflow

.github/workflows/post-publish.yml

@@ -12,7 +12,6 @@ jobs:
         run: |
           curl -L -H "Accept: application/vnd.github+json" ${{ github.event.release.tarball_url }} --output cryptomator-${{ github.event.release.tag_name }}.tar.gz
       - name: Sign source tarball with key 615D449FE6E6A235
-        if: startsWith(github.ref, 'refs/tags/')
         run: |
           echo "${GPG_PRIVATE_KEY}" | gpg --batch --quiet --import
           echo "${GPG_PASSPHRASE}" | gpg --batch --quiet --passphrase-fd 0 --pinentry-mode loopback -u 615D449FE6E6A235 --detach-sign -a cryptomator-*.tar.gz
@@ -35,6 +34,6 @@ jobs:
           SLACK_ICON_EMOJI: ':bot:'
           SLACK_CHANNEL: 'cryptomator-desktop'
           SLACK_TITLE: "Release ${{ github.event.repository.name }} ${{ github.event.release.tag_name }} published."
-          SLACK_MESSAGE: "Ready to <https://github.com/${{ github.repository }}/actions/workflows/debian.yml|deploy to PPA>."
+          SLACK_MESSAGE: "Ready to <https://github.com/${{ github.repository }}/actions/workflows/debian.yml|build deb Package>."
           SLACK_FOOTER: false
           MSG_MINIMAL: true

.github/workflows/win-exe.yml

@@ -300,6 +300,7 @@ jobs:
             Cryptomator-*.exe
             Cryptomator-*.asc
       - name: Slack Notification
+        if: ${{ needs.get-version.outputs.versionType == 'stable' }}
         uses: rtCamp/action-slack-notify@v2
         env:
           SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK_URL }}