Update dependency org.projectlombok:lombok to v1.18.38 (#223)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

WORKSPACE

@@ -183,7 +183,7 @@ maven_install(
         "org.immutables:value-annotations:2.10.1",
         "org.immutables:value-processor:2.10.1",
         "org.inferred:freebuilder:2.8.0",
-        "org.projectlombok:lombok:1.18.36",
+        "org.projectlombok:lombok:1.18.38",
     ] + testonly_artifacts([
         "com.google.truth.extensions:truth-java8-extension:1.2.0",
         "com.google.truth:truth:1.2.0",