Error generating diffs for a new .dmi file

[Cruix]

tgstation/tgstation#37695
https://github.com/tgstation/tgstation/pull/37695/checks?check_run_id=1102049

Octokit.NotFoundException: repositories/3234987/contents/icons/misc/pic_in_pic.dmi?ref=6adef1e6d4b5281a83f00a6112ae0a4bee2104c8 was not found.
   at Octokit.ApiPagination.<GetAllPages>d__0`1.MoveNext() in D:\octokit.net\Octokit\Clients\ApiPagination.cs:line 34
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1.ConfiguredTaskAwaiter.GetResult()
   at IconDiffBot.Core.GitHubManager.<GetFileAtCommit>d__10.MoveNext() in /src/IconDiffBot/GitHubManager.cs:line 135
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1.ConfiguredTaskAwaiter.GetResult()
   at IconDiffBot.Core.PayloadProcessor.<>c__DisplayClass10_2.<<GenerateDiffs>g__GetImageFor|4>d.MoveNext() in /src/IconDiffBot/PayloadProcessor.cs:line 215
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1.ConfiguredTaskAwaiter.GetResult()
   at IconDiffBot.Core.PayloadProcessor.<>c__DisplayClass10_1.<<GenerateDiffs>g__DiffDmi|0>d.MoveNext() in /src/IconDiffBot/PayloadProcessor.cs:line 221
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at IconDiffBot.Core.PayloadProcessor.<GenerateDiffs>d__10.MoveNext() in /src/IconDiffBot/PayloadProcessor.cs:line 257
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at IconDiffBot.Core.PayloadProcessor.<ScanPullRequestImpl>d__9.MoveNext() in /src/IconDiffBot/PayloadProcessor.cs:line 153