ci(release): fix YAML parse failure (heredoc footer broke block-scalar) and add manual recovery trigger

.github/release-footer.md

@@ -0,0 +1,26 @@
+
+---
+
+## How to install
+
+This release is distributed via the HellionChat custom repository, not the
+Dalamud main plugin repo. To install:
+
+1. In XIVLauncher: **Settings → Experimental → Custom Plugin Repositories**
+2. Add the URL:
+   `https://raw.githubusercontent.com/JonKazama-Hellion/HellionChat/main/repo.json`
+3. Enable, save, then `/xlplugins` → search **Hellion Chat** → install
+
+## Project documents
+
+- [README](https://github.com/JonKazama-Hellion/HellionChat/blob/main/README.md) — features, architecture, build
+- [Privacy notice](https://github.com/JonKazama-Hellion/HellionChat/blob/main/PRIVACY.md) — what the plugin stores and sends
+- [Third-party notices](https://github.com/JonKazama-Hellion/HellionChat/blob/main/THIRD_PARTY_NOTICES.md) — dependencies and licences
+- [Security policy](https://github.com/JonKazama-Hellion/HellionChat/blob/main/SECURITY.md) — vulnerability reporting
+- [Support](https://github.com/JonKazama-Hellion/HellionChat/blob/main/SUPPORT.md) — bug reports, questions, contact paths
+
+## Licence
+
+[EUPL-1.2](https://github.com/JonKazama-Hellion/HellionChat/blob/main/LICENSE).
+Based on [Chat 2](https://github.com/Infiziert90/ChatTwo) by Infi and Anna,
+also EUPL-1.2.