bazel syntax: rename SkylarkDict to Dict

This is a breaking change for copybara.

PiperOrigin-RevId: 280231492
diff --git a/src/main/java/com/google/devtools/build/lib/packages/TargetUtils.java b/src/main/java/com/google/devtools/build/lib/packages/TargetUtils.java
index a8d2d9f..e22434d 100644
--- a/src/main/java/com/google/devtools/build/lib/packages/TargetUtils.java
+++ b/src/main/java/com/google/devtools/build/lib/packages/TargetUtils.java
@@ -24,8 +24,8 @@
 import com.google.common.collect.Maps;
 import com.google.devtools.build.lib.cmdline.Label;
 import com.google.devtools.build.lib.events.Location;
+import com.google.devtools.build.lib.syntax.Dict;
 import com.google.devtools.build.lib.syntax.EvalException;
-import com.google.devtools.build.lib.syntax.SkylarkDict;
 import com.google.devtools.build.lib.util.Pair;
 import java.util.ArrayList;
 import java.util.Collection;
@@ -257,7 +257,7 @@
    * #legalExecInfoKeys}.
    *
    * @param executionRequirementsUnchecked execution_requirements of a rule, expected to be of a
-   *     {@code SkylarkDict<String, String>} type, null or {@link
+   *     {@code Dict<String, String>} type, null or {@link
    *     com.google.devtools.build.lib.syntax.Runtime#NONE}
    * @param rule a rule instance to get tags from
    * @param allowTagsPropagation if set to true, tags will be propagated from a target to the
@@ -269,7 +269,7 @@
       throws EvalException {
     Map<String, String> checkedExecutionRequirements =
         TargetUtils.filter(
-            SkylarkDict.castSkylarkDictOrNoneToDict(
+            Dict.castSkylarkDictOrNoneToDict(
                 executionRequirementsUnchecked,
                 String.class,
                 String.class,