Fix the fallout of https://github.com/bazelbuild/bazel/commit/f7eee1edc1f8dfc6d436894db2eb672bb11bc962 .

I did not notice the second call site of #shouldCheckFile() and neither did our
presubmit tests. Postsubmit came to the rescue, though.

RELNOTES: None.
PiperOrigin-RevId: 261146946

src/main/java/com/google/devtools/build/lib/skyframe/FilesystemValueChecker.java

diff --git a/src/main/java/com/google/devtools/build/lib/skyframe/FilesystemValueChecker.java b/src/main/java/com/google/devtools/build/lib/skyframe/FilesystemValueChecker.java
index e94cbd0..6c5342b 100644
--- a/src/main/java/com/google/devtools/build/lib/skyframe/FilesystemValueChecker.java
+++ b/src/main/java/com/google/devtools/build/lib/skyframe/FilesystemValueChecker.java
@@ -260,7 +260,8 @@
             dirtyKeys.add(keyAndValue.getFirst());
           } else {
             for (Artifact artifact : actionValue.getAllFileValues().keySet()) {
-              if (shouldCheckFile(knownModifiedOutputFiles, artifact)) {
+              if (!artifact.isMiddlemanArtifact()
+                  && shouldCheckFile(knownModifiedOutputFiles, artifact)) {
                 fileToKeyAndValue.put(artifact, keyAndValue);
               }
             }