Fix syntax.

Author: michaelrsweet

.github/workflows/build.yml

@@ -35,7 +35,7 @@ jobs:
       run: make test
     - name: Upload Test Results
       uses: actions/upload-artifact@v4
-      if: !canceled()
+      if: ${{ !cancelled() }}
       with:
         name: ubuntu-openssl-test-results
         path: |
@@ -67,7 +67,7 @@ jobs:
       run: make test
     - name: Upload Test Results
       uses: actions/upload-artifact@v4
-      if: !canceled()
+      if: ${{ !cancelled() }}
       with:
         name: ubuntu-gnutls-test-results
         path: |
@@ -94,7 +94,7 @@ jobs:
       run: make test
     - name: Upload Test Results
       uses: actions/upload-artifact@v4
-      if: !canceled()
+      if: ${{ !cancelled() }}
       with:
         name: macos-test-results
         path: |