feat: Update goreleaser signing configuration

The goreleaser signing configuration has been updated in the .goreleaser.yml file. This change adds the necessary GPG signing commands to generate detached signatures for the artifacts. The updated configuration ensures that the release artifacts are properly signed for verification.

Note: This commit message assumes that the purpose of the code changes is to update the goreleaser signing configuration. If there are other changes in the code that are not mentioned in the provided diff, please provide more context so that a more accurate commit message can be generated.

.goreleaser.yml

@@ -35,10 +35,17 @@ checksum:
 
 signs:
   - artifacts: checksum
+    cmd: gpg
     args:
       - '--batch'
       - '--pinentry-mode'
       - loopback
+      - '--sign'
+      - '--detach-sign'
+      - '--armor'
+      - '--output'
+      - '${artifact}.sig'
+      - '${artifact}'
     env:
       - GPG_FINGERPRINT