Work around for conditional execution in Woodpecker (#3)

Co-authored-by: Smaug123 <patrick+github@patrickstevens.co.uk>
Reviewed-on: #3

.woodpecker/.build.yml

@@ -1,16 +1,18 @@
 steps:
-    build:
-        image: nixos/nix
-        commands:
-          - echo 'experimental-features = flakes nix-command' >> /etc/nix/nix.conf
-          # Lint
-          - "nix develop --command bash -c 'dotnet tool restore && ./hooks/pre-push'"
-          # Test
-          - nix develop --command dotnet -- test
-          - nix develop --command dotnet -- test --configuration Release
-          # Perform build
-          - "pushd RaftFable && nix develop --command npm -- install && popd"
-          - "pushd RaftFable && nix develop --command npm -- run-script build && popd"
+  build:
+    image: nixos/nix
+    commands:
+      - echo 'experimental-features = flakes nix-command' >> /etc/nix/nix.conf
+      # Lint
+      - "nix develop --command bash -c 'dotnet tool restore && ./hooks/pre-push'"
+      # Test
+      - nix develop --command dotnet -- test
+      - nix develop --command dotnet -- test --configuration Release
+      # Perform build
+      - "pushd RaftFable && nix develop --command npm -- install && popd"
+      - "pushd RaftFable && nix develop --command npm -- run-script build && popd"
 
-when:
-  evaluate: '(CI_PIPELINE_EVENT == "push" && CI_COMMIT_BRANCH == CI_REPO_DEFAULT_BRANCH) || (CI_PIPELINE_EVENT == "pull_request")'
+    when:
+      - event: "push"
+        evaluate: 'CI_COMMIT_BRANCH == CI_REPO_DEFAULT_BRANCH'
+      - event: "pull_request"