fix(ci): respect rc pattern

.gitea/scripts/add-annotations.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-set -e
+set -eo pipefail
 
 CHART_FILE="Chart.yaml"
 if [ ! -f "${CHART_FILE}" ]; then

.gitea/workflows/release.yaml

@@ -71,8 +71,9 @@ jobs:
 
       - name: Add Artifacthub.io annotations
         run: |
-          NEW_TAG="$(git tag --sort=-version:refname | head -n 1)"
-          OLD_TAG="$(git tag --sort=-version:refname | head -n 2 | tail -n 1)"
+          rc_pattern="\-rc([-\.][0-9]+)?$"
+          NEW_TAG="$(git tag --sort=-version:refname | grep --invert-match --perl-regexp "${rc_pattern}" | head --lines 1)"
+          OLD_TAG="$(git tag --sort=-version:refname | grep --invert-match --perl-regexp "${rc_pattern}" | head --lines 2 | tail --lines 1)"
           .gitea/scripts/add-annotations.sh "${OLD_TAG}" "${NEW_TAG}"
 
       - name: Extract meta information