Updating doc

Author: OjhaAditi25

README.md

@@ -140,7 +140,7 @@ Any use of third-party trademarks or logos are subject to those third-party's po
 | [spin-button-needs-labelling](docs/rules/spin-button-needs-labelling.md)                                               | Accessibility: SpinButtons must have an accessible label                                                                                               | ✅  |    |    |
 | [spin-button-unrecommended-labelling](docs/rules/spin-button-unrecommended-labelling.md)                               | Accessibility: Unrecommended accessibility labelling - SpinButton                                                                                      | ✅  |    |    |
 | [spinner-needs-labelling](docs/rules/spinner-needs-labelling.md)                                                       | Accessibility: Spinner must have either aria-label or label, aria-live and aria-busy attributes                                                        | ✅  |    |    |
-| [split-button-needs-labelling](docs/rules/split-button-needs-labelling.md)                                             | Accessibility: SplitButton must have an accessible name via title, aria-label                                                                          | ✅  |    |    |
+| [split-button-needs-labelling](docs/rules/split-button-needs-labelling.md)                                             | Accessibility: SplitButton must have text content or accessible name on primaryActionButton prop.                                                      | ✅  |    |    |
 | [swatchpicker-needs-labelling](docs/rules/swatchpicker-needs-labelling.md)                                             | Accessibility: SwatchPicker must have an accessible name via aria-label, aria-labelledby, Field component, etc..                                       | ✅  |    |    |
 | [switch-needs-labelling](docs/rules/switch-needs-labelling.md)                                                         | Accessibility: Switch must have an accessible label                                                                                                    | ✅  |    |    |
 | [tablist-and-tabs-need-labelling](docs/rules/tablist-and-tabs-need-labelling.md)                                       | This rule aims to ensure that Tabs with icons but no text labels have an accessible name and that Tablist is properly labeled.                         | ✅  |    |    |

docs/rules/split-button-needs-labelling.md

@@ -1,4 +1,4 @@
-# Accessibility: SplitButton must have an accessible name via title, aria-label (`@microsoft/fluentui-jsx-a11y/split-button-needs-labelling`)
+# Accessibility: SplitButton must have text content or accessible name on primaryActionButton prop (`@microsoft/fluentui-jsx-a11y/split-button-needs-labelling`)
 
 💼 This rule is enabled in the ✅ `recommended` config.
 
@@ -22,6 +22,7 @@ Example of **incorrect** code for this rule:
    <SplitButton
       menuButton={triggerProps}
       primaryActionButton={primaryActionButtonProps}
+      icon={<CalendarMonthRegular />}
    />
 ```