Fix YAML indentation in website workflow heredoc

The heredoc body for version.js was at column 0 while the surrounding
run block is indented 10 spaces, causing YAML to terminate the block
scalar and fail with 'Invalid workflow file' at line 146. Replace the
heredoc with a grouped echo block that respects the block indentation.

.github/workflows/website.yml

@@ -142,13 +142,13 @@ jobs:
           commit_hash=$(git rev-parse HEAD)
           commit_short=$(git rev-parse --short HEAD)
           commit_date=$(git show -s --format=%cI HEAD)
-          cat > ../uutils.github.io/static/wasm/version.js <<EOF
-const UUTILS_WASM_VERSION = {
-  commit: "${commit_hash}",
-  short: "${commit_short}",
-  date: "${commit_date}"
-};
-EOF
+          {
+            echo "const UUTILS_WASM_VERSION = {"
+            echo "  commit: \"${commit_hash}\","
+            echo "  short: \"${commit_short}\","
+            echo "  date: \"${commit_date}\""
+            echo "};"
+          } > ../uutils.github.io/static/wasm/version.js
           echo "uutils WASM build: ${commit_short} (${commit_date})"
         fi