feat: change ship emoji to rocket (#1)

Author: ToppleTheNun

src/__fixtures__/example.json

@@ -5,7 +5,7 @@
       "type": "section",
       "text": {
         "type": "mrkdwn",
-        "text": ":ship: A new <https://github.com/test/test/commit/123|version> of <https://github.com/test/test|test/test> has been deployed!"
+        "text": ":rocket: A new <https://github.com/test/test/commit/123|version> of <https://github.com/test/test|test/test> has been deployed!"
       }
     }
   ]

src/publishedMessage.ts

@@ -16,7 +16,7 @@ export const publishedMessage = (
       Blocks.Section({
         text: dedent`
         ${Md.emoji(
-          "ship"
+          "rocket"
         )} A new ${linkToCommit} of ${linkToRepo} has been deployed!
       `,
       })