add Signing certificate fingerprint to readme

README.md

@@ -12,13 +12,23 @@
 [<img src="https://f-droid.org/badge/get-it-on.png"
       alt="Get it on F-Droid"
       height="80">](https://f-droid.org/packages/com.nextcloud.talk2/)
-      [<img src="https://github.com/user-attachments/assets/713d71c5-3dec-4ec4-a3f2-8d28d025a9c6"
+[<img src="https://github.com/user-attachments/assets/713d71c5-3dec-4ec4-a3f2-8d28d025a9c6"
       alt="Get it with Obtainium"
       height="80">](https://apps.obtainium.imranr.dev/redirect?r=obtainium://app/%7B%22id%22%3A%22com.nextcloud.talk2%22%2C%22url%22%3A%22https%3A%2F%2Fgithub.com%2Fnextcloud%2Ftalk-android%22%2C%22author%22%3A%22nextcloud%22%2C%22name%22%3A%22Talk%22%2C%22preferredApkIndex%22%3A0%2C%22additionalSettings%22%3A%22%7B%5C%22includePrereleases%5C%22%3Afalse%2C%5C%22fallbackToOlderReleases%5C%22%3Atrue%2C%5C%22filterReleaseTitlesByRegEx%5C%22%3A%5C%22%5C%22%2C%5C%22filterReleaseNotesByRegEx%5C%22%3A%5C%22%5C%22%2C%5C%22verifyLatestTag%5C%22%3Atrue%2C%5C%22sortMethodChoice%5C%22%3A%5C%22date%5C%22%2C%5C%22useLatestAssetDateAsReleaseDate%5C%22%3Afalse%2C%5C%22releaseTitleAsVersion%5C%22%3Afalse%2C%5C%22trackOnly%5C%22%3Afalse%2C%5C%22versionExtractionRegEx%5C%22%3A%5C%22%5C%22%2C%5C%22matchGroupToUse%5C%22%3A%5C%22%5C%22%2C%5C%22versionDetection%5C%22%3Atrue%2C%5C%22releaseDateAsVersion%5C%22%3Afalse%2C%5C%22useVersionCodeAsOSVersion%5C%22%3Afalse%2C%5C%22apkFilterRegEx%5C%22%3A%5C%22%5Enextcloud.*%5C%22%2C%5C%22invertAPKFilter%5C%22%3Afalse%2C%5C%22autoApkFilterByArch%5C%22%3Atrue%2C%5C%22appName%5C%22%3A%5C%22Nextcloud%20Talk%5C%22%2C%5C%22appAuthor%5C%22%3A%5C%22%5C%22%2C%5C%22shizukuPretendToBeGooglePlay%5C%22%3Afalse%2C%5C%22allowInsecure%5C%22%3Afalse%2C%5C%22exemptFromBackgroundUpdates%5C%22%3Afalse%2C%5C%22skipUpdateNotifications%5C%22%3Afalse%2C%5C%22about%5C%22%3A%5C%22%5C%22%2C%5C%22refreshBeforeDownload%5C%22%3Atrue%7D%22%2C%22overrideSource%22%3Anull%7D)
 
 
 Please note that Notifications won't work with the F-Droid version due to missing Google Play Services.
 
+Signing certificate fingerprint to [verify](https://developer.android.com/studio/command-line/apksigner#usage-verify)
+the APK (same as for the [Nextcloud Android client app](https://github.com/nextcloud/android)):
+- APK with "gplay" name, found [here](https://github.com/nextcloud/talk-android/releases) or distributed via Google Play Store
+- APK with "nextcloud", found [here](https://github.com/nextcloud/talk-android/releases)
+- not suitable for Fdroid downloads, as Fdroid is signing it on their own
+```
+SHA-256: fb009522f65e25802261b67b10a45fd70e610031976f40b28a649e152ded0373
+SHA-1: 74aa1702e714941be481e1f7ce4a8f779c19dcea
+```
+
 |||||||
 |---|---|---|---|---|---|
 |![Conversation list](/fastlane/metadata/android/en-US/images/phoneScreenshots/conversationList_light.png "Conversation list")|![Participant search](/fastlane/metadata/android/en-US/images/phoneScreenshots/searchParticipant_light.png "Participant search")|![Voice call](/fastlane/metadata/android/en-US/images/phoneScreenshots/voiceCall.png "Voice call")|![Voice recording](/fastlane/metadata/android/en-US/images/phoneScreenshots/voiceRecord_light.png "Voice recording")|![Markdown view](/fastlane/metadata/android/en-US/images/phoneScreenshots/markdown_light.png "Markdown view")|![Settings](/fastlane/metadata/android/en-US/images/phoneScreenshots/settings_light.png "Settings")|