Bump app build and version number

[unified-ci-app]

Summary

Bump app build number to 503
Bump app version number to 2.13.0
Generated by the following Github Actions run: https://github.com/mattermost/delivery-platform/actions/runs/7613069516

Release Note

NONE

[mattermost-build]

Hello @unified-ci-app[bot],

Thanks for your pull request! A Core Committer will review your pull request soon. For code contributions, you can learn more about the review process here.

[mattermost-build]

Cherry pick is scheduled.

[mattermost-build]

Error trying doing the automated Cherry picking. Please do this manually

+++ Updating remotes...
Fetching upstream
hostfile_replace_entries: mkstemp: Read-only file system
update_known_hosts: hostfile_replace_entries failed for /app/.ssh/known_hosts: Read-only file system
From github.com:mattermost/mattermost-mobile
 * [new branch]          build-release-502 -> upstream/build-release-502
 * [new branch]          chore-bump-release-2.12-1705920641 -> upstream/chore-bump-release-2.12-1705920641
   73c9bf058..f94e3688e  main              -> upstream/main
   3eea0cc93..28cc82734  release-2.12      -> upstream/release-2.12
Fetching upstream
hostfile_replace_entries: mkstemp: Read-only file system
update_known_hosts: hostfile_replace_entries failed for /app/.ssh/known_hosts: Read-only file system
+++ Updating remotes done...
+++ Creating local branch automated-cherry-pick-of-mattermost-mobile-#7779-upstream-release-2.13-1705935959
Switched to a new branch 'automated-cherry-pick-of-mattermost-mobile-#7779-upstream-release-2.13-1705935959'
Branch 'automated-cherry-pick-of-mattermost-mobile-#7779-upstream-release-2.13-1705935959' set up to track remote branch 'release-2.13' from 'upstream'.

+++ About to attempt cherry pick of PR #7779 with merge commit f94e3688e395703eed412fcfb4ce5a6378aa2c64.

Auto-merging android/app/build.gradle
CONFLICT (content): Merge conflict in android/app/build.gradle
Auto-merging ios/Mattermost.xcodeproj/project.pbxproj
CONFLICT (content): Merge conflict in ios/Mattermost.xcodeproj/project.pbxproj
Auto-merging ios/Mattermost/Info.plist
CONFLICT (content): Merge conflict in ios/Mattermost/Info.plist
Auto-merging ios/MattermostShare/Info.plist
CONFLICT (content): Merge conflict in ios/MattermostShare/Info.plist
Auto-merging ios/NotificationService/Info.plist
CONFLICT (content): Merge conflict in ios/NotificationService/Info.plist
error: could not apply f94e3688e... Bump app build and version number (#7779)
hint: After resolving the conflicts, mark them with
hint: "git add/rm <pathspec>", then run
hint: "git cherry-pick --continue".
hint: You can instead skip this commit with "git cherry-pick --skip".
hint: To abort and get back to the state before "git cherry-pick",
hint: run "git cherry-pick --abort".

+++ Conflicts detected:

UU android/app/build.gradle
UU ios/Mattermost.xcodeproj/project.pbxproj
UU ios/Mattermost/Info.plist
UU ios/MattermostShare/Info.plist
UU ios/NotificationService/Info.plist
Aborting.

+++ Aborting in-progress git cherry-pick.

+++ Returning you to the master branch and cleaning up.

[mvitale1989]

I'll reproduce these changes on top of the release-2.13 branch