ci: disable tag signing when releasing (#33)

Currently, the use of the [@semantic-release/git](https://github.com/semantic-release/git)
plugin for signing tags in CI causes the process to hang indefinitely.

Refer to [this](semantic-release/semantic-release#3065)
issue for more details.

.github/workflows/ci.yml

@@ -65,7 +65,9 @@ jobs:
           git_commit_gpgsign: true
           git_committer_email: ${{ secrets.GIT_COMMITTER_EMAIL }}
           git_committer_name: ${{ secrets.GIT_COMMITTER_NAME }}
-          git_tag_gpgsign: true
+          # Currently, signing commits leads to the CI hanging indefinitely.
+          # See https://github.com/semantic-release/semantic-release/issues/3065
+          git_tag_gpgsign: false
           git_user_signingkey: true
           gpg_private_key: ${{ secrets.GPG_KEY }}
           passphrase: ${{ secrets.GPG_KEY_PASSPHRASE }}