fix: Deadlock with IDEA EAP 2023-3 EAP

Fixes #1192

Signed-off-by: azerr <[email protected]>

src/main/java/com/redhat/devtools/intellij/lsp4ij/internal/PromiseToCompletableFuture.java

@@ -91,7 +91,7 @@ private void bind(CancellablePromise<ResultOrError<R>> promise) {
         promise.onError(ex -> {
             if (ex instanceof ProcessCanceledException || ex instanceof CancellationException) {
                 // Case 2: cancel the completable future
-                this.cancel(true);
+                super.cancel(true);
             } else {
                 // Other case..., mark the completable future as error
                 this.completeExceptionally(ex);