ci: Rename release to optimize

.github/workflows/main.yml

@@ -11,7 +11,7 @@ jobs:
       matrix:
         os: [ubuntu-latest, windows-latest]
         step: [examples, test]
-        release: [Debug, ReleaseSafe, ReleaseFast, ReleaseSmall]
+        optimize: [Debug, ReleaseSafe, ReleaseFast, ReleaseSmall]
     runs-on: ${{matrix.os}}
     steps:
       - uses: actions/checkout@v3
@@ -20,7 +20,7 @@ jobs:
       - uses: goto-bus-stop/setup-zig@v2.0.1
         with:
           version: master
-      - run: zig build ${{ matrix.step }} -Doptimize=${{ matrix.release }}
+      - run: zig build ${{ matrix.step }} -Doptimize=${{ matrix.optimize }}
   lint:
     runs-on: ubuntu-latest
     steps: