fix(unstable): prosody dsa1024 pubkey support (#2101)

.github/workflows/unstable.yml

@@ -24,6 +24,8 @@ jobs:
       - name: Prosody gpg key
         id: prosody_gpg_key
         run: curl --location --silent --show-error https://prosody.im/files/prosody-debian-packages.key | sudo dd of=/etc/apt/trusted.gpg.d/prosody.gpg
+      - name: Prosody dsa1024 key support
+        run: echo -e "[hash_algorithms]\nsha1.second_preimage_resistance = \"always\"\n\n[asymmetric_algorithms]\ndsa1024 = \"always\"\n" > /etc/crypto-policies/back-ends/apt-sequoia.config
       - name: Prosody repo
         uses: myci-actions/add-deb-repo@11
         with: