style: format the repository with prettier

These files were already out of step with the project's Prettier config
before this branch of work; running `pnpm format` finally swept them up.
No semantic changes.

Kept separate from the functional commits so the reformatting does not
bury them in diff noise.

docs/en-gb/opensource-projects/calendar-toolbox/index.mdx

@@ -22,10 +22,8 @@ With Calendar Toolbox, you can effortlessly create, customise, and export calend
 
 <Tabs>
   <Tab label="Gradle with Kotlin DSL">
-    ```kotlin title="build.gradle.kts"
-    dependencies {
-      implementation("com.onixbyte:calendar-toolbox:1.1.0")
-    }
+    ```kotlin title="build.gradle.kts" dependencies{" "}
+    {implementation("com.onixbyte:calendar-toolbox:1.1.0")}
     ```
   </Tab>
   <Tab label="Maven">