ci: fix literal ${matrix.task} in step names (Gitea does not resolve them)

Replace with static names. Job names still use matrix templates (those work).

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

.gitea/workflows/ci.yaml

@@ -119,7 +119,7 @@ jobs:
       - name: Create test database
         run: PGPASSWORD=mypassword psql -h postgres -U myuser -d mydb -c "CREATE DATABASE crussell_test_db;" 2>/dev/null || true
 
-      - name: Test (${{ matrix.label }} tags)
+      - name: Run tests
         working-directory: backend
         run: go test -tags "${{ matrix.gotags }}" -count=1 ${{ matrix.verbose }} -timeout 180s ./...
         env:
@@ -189,7 +189,7 @@ jobs:
       - name: Create test database
         run: PGPASSWORD=mypassword psql -h postgres -U myuser -d mydb -c "CREATE DATABASE crussell_test_db;" 2>/dev/null || true
 
-      - name: Race (${{ matrix.label }} tags)
+      - name: Run race detector
         working-directory: backend
         run: go test -tags "${{ matrix.gotags }}" -race -count=1 -timeout 240s ./...
         env:
@@ -299,5 +299,5 @@ jobs:
       - name: Install dependencies
         run: cd frontend && npm ci
 
-      - name: ${{ matrix.task }}
+      - name: Run QC task
         run: cd frontend && ${{ matrix.cmd }}