test: fix wrong selector

Author: mathis-m

test/e2e-cypress/tests/bugs/6475.js

@@ -25,7 +25,7 @@ describe("#6475: 'Examples' keyword definitions can not be rendered as xml", ()
       .get(".opblock-section-request-body")
       .within(() => {
         cy
-          .get(".textarea")
+          .get("textarea")
           .should("include.text", xmlIndicator)
       })
   })
@@ -56,7 +56,7 @@ describe("#6475: 'Example' keyword definitions can not be rendered as xml", () =
       .get(".opblock-section-request-body")
       .within(() => {
         cy
-          .get(".textarea")
+          .get("textarea")
           .should("include.text", xmlIndicator)
       })
   })