CI: Move sha256sum calculation before registry upload

.forgejo/workflows/publish.yaml

@@ -26,6 +26,9 @@ jobs:
 
       - name: Build release binary
         run: just full-build
+      - name: Calculate SHA-256 hash
+        run: just shasum
+
       - name: Publish to git.jutty.dev package registry
         run: |
           version=$(./target/release/en --version)
@@ -35,6 +38,3 @@ jobs:
           curl -fsSL \
           --user jutty:${{ secrets.GJD_REGISTRY_TOKEN }} \
           --upload-file target/release/en $url
-
-      - name: Calculate SHA-256 hash
-        run: just shasum