fix(deps): update activity to v1.12.1

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
androidx.activity:activity-compose (source)	1.11.0 -> 1.12.1
androidx.activity:activity (source)	1.11.0 -> 1.12.1

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Quality Gate passed

Issues
0 New issues
0 Accepted issues

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0.0% Coverage on New Code
0.0% Duplication on New Code

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[ElementBot]

	Warnings
⚠️	gradle/libs.versions.toml#L8 - A newer version of org.jetbrains.kotlin.plugin.serialization than 2.2.20 is available: 2.2.21
⚠️	gradle/libs.versions.toml#L18 - A newer version of androidx.lifecycle:lifecycle-runtime-ktx than 2.9.2 is available: 2.10.0
⚠️	gradle/libs.versions.toml#L25 - A newer version of androidx.compose:compose-bom than 2025.07.00 is available: 2025.12.00
⚠️	gradle/libs.versions.toml#L44 - A newer version of com.airbnb.android:showkase-processor than 1.0.4 is available: 1.0.5
⚠️	gradle/libs.versions.toml#L49 - A newer version of dev.chrisbanes.haze:haze-materials than 1.6.10 is available: 1.7.1
⚠️	gradle/libs.versions.toml#L55 - A newer version of dev.zacsweers.metro:runtime than 0.7.7 is available: 0.8.0
⚠️	gradle/libs.versions.toml#L65 - A newer version of org.jetbrains.kotlinx:kover-gradle-plugin than 0.9.1 is available: 0.9.3
⚠️	gradle/libs.versions.toml#L93 - A newer version of androidx.exifinterface:exifinterface than 1.4.1 is available: 1.4.2
⚠️	gradle/libs.versions.toml#L168 - A newer version of org.robolectric:robolectric than 4.15.1 is available: 4.16
⚠️	gradle/libs.versions.toml#L209 - A newer version of org.maplibre.gl:android-sdk than 12.2.0 is available: 12.2.1
⚠️	gradle/libs.versions.toml#L219 - A newer version of com.posthog:posthog-android than 3.26.0 is available: 3.27.2

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