fix(amazonq): fix an accidental revert to make max @workspace indexing size to 4GB (aws#5079)

Author: andrewyuq

plugins/amazonq/codewhisperer/jetbrains-community/src/software/aws/toolkits/jetbrains/services/codewhisperer/settings/CodeWhispererConfigurable.kt

@@ -148,7 +148,7 @@ class CodeWhispererConfigurable(private val project: Project) :
 
             row(message("aws.settings.codewhisperer.project_context_index_max_size")) {
                 intTextField(
-                    range = IntRange(1, 250)
+                    range = IntRange(1, 4096)
                 ).bindIntText(codeWhispererSettings::getProjectContextIndexMaxSize, codeWhispererSettings::setProjectContextIndexMaxSize)
                     .apply {
                         connect.subscribe(