Bump androidx.webkit:webkit from 1.15.0 to 1.16.0 (#3219)

Bumps androidx.webkit:webkit from 1.15.0 to 1.16.0.

---
updated-dependencies:
- dependency-name: androidx.webkit:webkit
  dependency-version: 1.16.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]

FlowCrypt/build.gradle.kts

@@ -509,7 +509,7 @@ dependencies {
   implementation("androidx.navigation:navigation-fragment-ktx:2.9.8")
   implementation("androidx.navigation:navigation-ui-ktx:2.9.8")
   implementation("androidx.navigation:navigation-runtime-ktx:2.9.8")
-  implementation("androidx.webkit:webkit:1.15.0")
+  implementation("androidx.webkit:webkit:1.16.0")
 
   implementation("com.google.android.gms:play-services-base:18.10.0")
   implementation("com.google.android.gms:play-services-auth:21.5.1")