Update incompatible_display_source_file_location flag description

The default value of this flag is true, not false.

Closes bazelbuild#14332.

PiperOrigin-RevId: 417640868

src/main/java/com/google/devtools/build/lib/query2/common/CommonQueryOptions.java

@@ -167,7 +167,7 @@ public Set<Setting> toSettings() {
       effectTags = {OptionEffectTag.TERMINAL_OUTPUT},
       metadataTags = {OptionMetadataTag.INCOMPATIBLE_CHANGE},
       help =
-          "False by default, displays the target of the source file. "
+          "True by default, displays the target of the source file. "
               + "If true, displays the location of line 1 of source files in location outputs. "
               + "This flag only exists for migration purposes.")
   public boolean displaySourceFileLocation;