Fix release workflow heredoc formatting

.gitea/workflows/release.yml

@@ -90,18 +90,18 @@ jobs:
           VERSION="${{ steps.version.outputs.version }}"
           echo "${TOKEN}" | docker login git.dvv.one -u "${USERNAME}" --password-stdin
 
-          cat > Dockerfile.relay <<'DOCKER'
-          FROM debian:bookworm-slim
-          COPY target/release/relay /usr/local/bin/relay
-          EXPOSE 7000 7001 25565
-          ENTRYPOINT ["/usr/local/bin/relay"]
-DOCKER
+          printf '%s\n' \
+            'FROM debian:bookworm-slim' \
+            'COPY target/release/relay /usr/local/bin/relay' \
+            'EXPOSE 7000 7001 25565' \
+            'ENTRYPOINT ["/usr/local/bin/relay"]' \
+            > Dockerfile.relay
 
-          cat > Dockerfile.client <<'DOCKER'
-          FROM debian:bookworm-slim
-          COPY target/release/client /usr/local/bin/client
-          ENTRYPOINT ["/usr/local/bin/client"]
-DOCKER
+          printf '%s\n' \
+            'FROM debian:bookworm-slim' \
+            'COPY target/release/client /usr/local/bin/client' \
+            'ENTRYPOINT ["/usr/local/bin/client"]' \
+            > Dockerfile.client
 
           docker build -f Dockerfile.relay -t git.dvv.one/${GITHUB_REPOSITORY,,}/relay:${VERSION} .
           docker build -f Dockerfile.client -t git.dvv.one/${GITHUB_REPOSITORY,,}/client:${VERSION} .