Suppress two more warnings for spotbugs 4.8.3

Will be needed with parent pom 4.77.

Author: MarkEWaite

lib/src/main/java/com/cloudbees/groovy/cps/impl/NotBlock.java

@@ -34,6 +34,7 @@ public Next receive(Object o) {
         return new ContinuationImpl(e, k).then(b, e, cast);
     }
 
+    @SuppressFBWarnings(value = "SIC_INNER_SHOULD_BE_STATIC", justification = "Common Jenkins pattern that inner classses are not static.")
     class ContinuationImpl extends ContinuationGroup {
         final Continuation k;
         final Env e;

plugin/src/main/java/org/jenkinsci/plugins/workflow/cps/CpsFlowExecution.java

@@ -267,6 +267,7 @@ public class CpsFlowExecution extends FlowExecution implements BlockableResume {
      *
      * @see #runInCpsVmThread(FutureCallback)
      */
+    @SuppressFBWarnings(value = "PA_PUBLIC_PRIMITIVE_ATTRIBUTE", justification = "Preserve API compatibility.")
     public transient volatile ListenableFuture<CpsThreadGroup> programPromise;
     private transient volatile Collection<ListenableFuture<?>> pickleFutures;