fix: rename GITEA_TOKEN to DEPLOY_TOKEN in CI workflow

GITEA_TOKEN is a reserved name in Gitea — the UI and API reject it
when creating action secrets.

.gitea/workflows/release.yml

@@ -15,7 +15,7 @@ jobs:
       - name: Create Gitea release
         id: create
         env:
-          GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}
+          GITEA_TOKEN: ${{ secrets.DEPLOY_TOKEN }}
         run: |
           TAG="${{ gitea.ref_name }}"
           BASE_URL="${{ gitea.server_url }}/api/v1/repos/${{ gitea.repository }}"
@@ -126,7 +126,7 @@ jobs:
 
       - name: Attach assets to release
         env:
-          GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}
+          GITEA_TOKEN: ${{ secrets.DEPLOY_TOKEN }}
         run: |
           RELEASE_ID="${{ needs.create-release.outputs.release_id }}"
           BASE_URL="${{ gitea.server_url }}/api/v1/repos/${{ gitea.repository }}"
@@ -196,7 +196,7 @@ jobs:
 
       - name: Attach tarball to release
         env:
-          GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}
+          GITEA_TOKEN: ${{ secrets.DEPLOY_TOKEN }}
         run: |
           RELEASE_ID="${{ needs.create-release.outputs.release_id }}"
           BASE_URL="${{ gitea.server_url }}/api/v1/repos/${{ gitea.repository }}"
@@ -248,7 +248,7 @@ jobs:
         id: docker-login
         continue-on-error: true
         run: |
-          echo "${{ secrets.GITEA_TOKEN }}" | docker login \
+          echo "${{ secrets.DEPLOY_TOKEN }}" | docker login \
             "${{ steps.meta.outputs.server_host }}" \
             -u "${{ gitea.actor }}" --password-stdin