Updates a stale Javadoc link to getValues.

Current link goes to AbstractSkyFunctionEnvironment#getValues which is uncommented. SkyFunction.Environment#getValues contains the relevant information about GroupedList.

PiperOrigin-RevId: 407738795

Author: aoeui

src/main/java/com/google/devtools/build/skyframe/SkyFunctionEnvironment.java

@@ -123,7 +123,7 @@ class SkyFunctionEnvironment extends AbstractSkyFunctionEnvironment {
    * The grouped list of values requested during this build as dependencies. On a subsequent build,
    * if this value is dirty, all deps in the same dependency group can be checked in parallel for
    * changes. In other words, if dep1 and dep2 are in the same group, then dep1 will be checked in
-   * parallel with dep2. See {@link #getValues} for more.
+   * parallel with dep2. See {@link SkyFunction.Environment#getValues} for more.
    */
   private final GroupedListHelper<SkyKey> newlyRequestedDeps = new GroupedListHelper<>();