invoke gzip with -n

resolves package-contains-timestamped-gzip
https://lintian.debian.org/tags/package-contains-timestamped-gzip.html

.github/workflows/CICD.yml

@@ -310,7 +310,7 @@ jobs:
 
           # Man page
           install -Dm644 'target/${{ matrix.job.target }}/release/build/${{ env.PROJECT_NAME }}'-*/out/assets/manual/bat.1 "${DPKG_DIR}/usr/share/man/man1/${{ env.PROJECT_NAME }}.1"
-          gzip --best "${DPKG_DIR}/usr/share/man/man1/${{ env.PROJECT_NAME }}.1"
+          gzip -n --best "${DPKG_DIR}/usr/share/man/man1/${{ env.PROJECT_NAME }}.1"
 
           # Autocompletion files
           install -Dm644 'target/${{ matrix.job.target }}/release/build/${{ env.PROJECT_NAME }}'-*/out/assets/completions/bat.fish "${DPKG_DIR}/usr/share/fish/vendor_completions.d/${{ env.PROJECT_NAME }}.fish"