chore: apply string changes from #9565 (#9629)

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## **Description**

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This PR only covers the strings from #9565.

## **Related issues**

Split off from: #9565

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locales/languages/en.json

@@ -2556,15 +2556,14 @@
       "action_text": "Try it out"
     },
     "stx": {
-      "header": "Introducing Smart Transactions",
-      "description_1": "Unlock the safest, most reliable, and easiest transaction experience - a smarter way to navigate web3.",
-      "description_2": "Millions of dollars are lost every month due to failed transactions & frontrunning. Smart transactions fixes this.",
-      "description_3": "Right now, Smart Transactions are only available on ETH Mainnet. You can turn them off at any time in settings.",
-      "secondary_button": "Not right now",
-      "primary_button": "Enable Smart Transactions",
+      "header": "Transactions just got smarter",
+      "description_1": "Unlock higher success rates, frontrunning protection, and better visibility with Smart Transactions.",
+      "description_2": "Only available on Ethereum. Enable or disable any time in settings.",
+      "secondary_button": "No thanks",
+      "primary_button": "Enable",
       "learn_more": "Learn more.",
-      "benefit_1_1": "82% fewer failed",
-      "benefit_1_2": "transactions",
+      "benefit_1_1": "99.5% success",
+      "benefit_1_2": "rate",
       "benefit_2_1": "Transaction",
       "benefit_2_2": "protection",
       "benefit_3_1": "Real-time",