fix(deps): update dependency com.google.code.gson:gson to v2.13.1

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

library/build.gradle

@@ -63,7 +63,7 @@ dependencies {
     api 'com.squareup.okhttp3:okhttp:5.0.0-alpha.14'
     implementation 'com.github.bitfireAT:dav4jvm:2.2.1'
     // in transition phase, we use old and new libs
-    implementation group: 'com.google.code.gson', name: 'gson', version: '2.12.1'
+    implementation group: 'com.google.code.gson', name: 'gson', version: '2.13.1'
     implementation 'androidx.annotation:annotation:1.9.1'
     compileOnly 'com.google.code.findbugs:annotations:3.0.1'