Bump com.google.android.gms:play-services-auth from 21.3.0 to 21.4.0

Bumps com.google.android.gms:play-services-auth from 21.3.0 to 21.4.0.

---
updated-dependencies:
- dependency-name: com.google.android.gms:play-services-auth
  dependency-version: 21.4.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

FlowCrypt/build.gradle.kts

@@ -477,7 +477,7 @@ dependencies {
   implementation("androidx.webkit:webkit:1.14.0")
 
   implementation("com.google.android.gms:play-services-base:18.7.0")
-  implementation("com.google.android.gms:play-services-auth:21.3.0")
+  implementation("com.google.android.gms:play-services-auth:21.4.0")
   implementation("com.google.android.material:material:1.12.0")
   implementation("com.google.android.flexbox:flexbox:3.0.0")
   implementation("com.google.code.gson:gson:2.13.1")