Update dependency androidx.core:core-ktx to v1.15.0 (slackhq#1774)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
|
[androidx.core:core-ktx](https://developer.android.com/jetpack/androidx/releases/core#1.15.0)
([source](https://cs.android.com/androidx/platform/frameworks/support))
| dependencies | minor | `1.13.1` -> `1.15.0` |

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gradle/libs.versions.toml

@@ -138,7 +138,7 @@ androidx-compose-ui-util = { module = "androidx.compose.ui:ui-util", version.ref
 # Embed XML via view binding into Composables
 androidx-compose-ui-viewBinding = { module = "androidx.compose.ui:ui-viewbinding", version.ref = "compose-ui" }
 
-androidx-core = "androidx.core:core-ktx:1.13.1"
+androidx-core = "androidx.core:core-ktx:1.15.0"
 
 androidx-datastore-preferences = { module = "androidx.datastore:datastore-preferences", version.ref = "datastore" }