fix(ci): build changelog from last stable release tag

.gitea/workflows/release.yml

@@ -26,13 +26,19 @@ jobs:
           set -euo pipefail
 
           current_tag="${GITHUB_REF_NAME}"
-          previous_tag=""
+          previous_stable_tag=""
 
-          if previous_tag="$(git describe --tags --abbrev=0 "${current_tag}^" 2>/dev/null)"; then
-            range="${previous_tag}..${current_tag}"
+          if previous_stable_tag="$(
+            git describe --tags --abbrev=0 \
+              --exclude '*-rc*' \
+              --exclude '*-beta*' \
+              --exclude '*-alpha*' \
+              "${current_tag}^" 2>/dev/null
+          )"; then
+            range="${previous_stable_tag}..${current_tag}"
             {
               printf '## Changelog\n\n'
-              printf 'Changes since `%s`.\n\n' "${previous_tag}"
+              printf 'Changes since `%s`.\n\n' "${previous_stable_tag}"
               git log --reverse --pretty=format:'- %h %s' "${range}"
               printf '\n'
             } >CHANGELOG.md