Fix CI: pass changelog notes via env var instead of inline interpolation

The ${{ steps.changelog.outputs.notes }} expression was being interpolated
directly into shell commands, causing parse errors when the changelog
contained special characters, markdown, or backticks.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.forgejo/workflows/release.yml

@@ -83,6 +83,8 @@ jobs:
           } >> "$GITHUB_OUTPUT"
 
       - name: Generate latest.json
+        env:
+          CHANGELOG_NOTES: ${{ steps.changelog.outputs.notes }}
         run: |
           TAG="${GITHUB_REF_NAME}"
           VERSION="${GITHUB_REF_NAME#v}"
@@ -123,7 +125,7 @@ jobs:
 
           jq -n \
             --arg version "$VERSION" \
-            --arg notes "${{ steps.changelog.outputs.notes }}" \
+            --arg notes "$CHANGELOG_NOTES" \
             --arg pub_date "$PUB_DATE" \
             --argjson platforms "$PLATFORMS" \
             '{version: $version, notes: $notes, pub_date: $pub_date, platforms: $platforms}' \
@@ -135,22 +137,20 @@ jobs:
       - name: Create release and upload assets
         env:
           FORGEJO_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          CHANGELOG_NOTES: ${{ steps.changelog.outputs.notes }}
         run: |
           TAG="${GITHUB_REF_NAME}"
           API_URL="${GITHUB_SERVER_URL}/api/v1"
           REPO="${GITHUB_REPOSITORY}"
 
-          BODY=$(cat <<'BODY_EOF'
-          ${{ steps.changelog.outputs.notes }}
+          BODY="${CHANGELOG_NOTES}
 
           ---
 
           ## Installation
 
-          **Windows** : Téléchargez le fichier `.exe` ci-dessous.
-          **Linux** : Téléchargez le fichier `.deb` ou `.AppImage` ci-dessous.
-          BODY_EOF
-          )
+          **Windows** : Téléchargez le fichier \`.exe\` ci-dessous.
+          **Linux** : Téléchargez le fichier \`.deb\` ou \`.AppImage\` ci-dessous."
 
           # Create release
           RELEASE_RESPONSE=$(curl -s -X POST \