Update cy examples to use find* (testing-library#462)

Author: coryhouse

docs/dom-testing-library/api-queries.md

@@ -245,7 +245,7 @@ const inputNode = screen.getByPlaceholderText('Username')
 <!--Cypress-->
 
 ```js
-cy.getByPlaceholderText('Username').should('exist')
+cy.findByPlaceholderText('Username').should('exist')
 ```
 
 <!--END_DOCUSAURUS_CODE_TABS-->
@@ -301,7 +301,7 @@ const aboutAnchorNode = screen.getByText(/about/i)
 <!--Cypress-->
 
 ```js
-cy.getByText(/about/i).should('exist')
+cy.findByText(/about/i).should('exist')
 ```
 
 <!--END_DOCUSAURUS_CODE_TABS-->
@@ -376,7 +376,7 @@ const incrediblesPosterImg = screen.getByAltText(/incredibles.*? poster/i)
 <!--Cypress-->
 
 ```js
-cy.getByAltText(/incredibles.*? poster/i).should('exist')
+cy.findByAltText(/incredibles.*? poster/i).should('exist')
 ```
 
 <!--END_DOCUSAURUS_CODE_TABS-->
@@ -432,8 +432,8 @@ const closeElement = screen.getByTitle('Close')
 <!--Cypress-->
 
 ```js
-cy.getByTitle('Delete').should('exist')
-cy.getByTitle('Close').should('exist')
+cy.findByTitle('Delete').should('exist')
+cy.findByTitle('Close').should('exist')
 ```
 
 <!--END_DOCUSAURUS_CODE_TABS-->
@@ -488,7 +488,7 @@ const lastNameInput = screen.getByDisplayValue('Norris')
 <!--Cypress-->
 
 ```js
-cy.getByDisplayValue('Norris').should('exist')
+cy.findByDisplayValue('Norris').should('exist')
 ```
 
 <!--END_DOCUSAURUS_CODE_TABS-->
@@ -525,7 +525,7 @@ const messageTextArea = screen.getByDisplayValue('Hello World')
 <!--Cypress-->
 
 ```js
-cy.getByDisplayValue('Hello World').should('exist')
+cy.findByDisplayValue('Hello World').should('exist')
 ```
 
 <!--END_DOCUSAURUS_CODE_TABS-->
@@ -566,7 +566,7 @@ const selectElement = screen.getByDisplayValue('Alaska')
 <!--Cypress-->
 
 ```js
-cy.getByDisplayValue('Alaska').should('exist')
+cy.findByDisplayValue('Alaska').should('exist')
 ```
 
 <!--END_DOCUSAURUS_CODE_TABS-->
@@ -641,7 +641,7 @@ assertions about the `Open dialog`-button you would need to use
 The default value for `hidden` can [be configured](api-configuration#configuration).
 
 Certain roles can have a selected state. You can filter the 
-returned elements that by their selected state
+returned elements by their selected state
 by setting `selected: true` or `selected: false`.
 
 For example in
@@ -686,7 +686,7 @@ const dialogContainer = screen.getByRole('dialog')
 <!--Cypress-->
 
 ```js
-cy.getByRole('dialog').should('exist')
+cy.findByRole('dialog').should('exist')
 ```
 
 <!--END_DOCUSAURUS_CODE_TABS-->
@@ -735,7 +735,7 @@ const element = screen.getByTestId('custom-element')
 <!--Cypress-->
 
 ```js
-cy.getByTestId('custom-element').should('exist')
+cy.findByTestId('custom-element').should('exist')
 ```
 
 <!--END_DOCUSAURUS_CODE_TABS-->