Update list of targets to index

Author: yim-lee

.spi.yml

@@ -5,4 +5,15 @@
 version: 1
 builder:
   configs:
-    - documentation_targets: [SwiftSyntax]
+    - documentation_targets: 
+      - IDEUtils
+      - SwiftBasicFormat
+      - SwiftCompilerSupport
+      - SwiftDiagnostics
+      - SwiftOperators
+      - SwiftParser
+      - SwiftParserDiagnostics
+      - SwiftRefactor
+      - SwiftSyntax
+      - SwiftSyntaxBuilder
+      - SwiftSyntaxParser