docs: fix typo neccessary -> necessary - #4127

An error happened while updating the labels on the PR: Octokit.ForbiddenException: Resource not accessible by integration at Octokit.Connection.HandleErrors(IResponse response) in /_/Octokit/Http/Connection.cs:line 817 at Octokit.Connection.RunRequest(IRequest request, CancellationToken cancellationToken, Func`2 preprocessResponseBody) in /_/Octokit/Http/Connection.cs:line 798 at Octokit.Connection.Run[T](IRequest request, CancellationToken cancellationToken, Func`2 preprocessResponseBody) in /_/Octokit/Http/Connection.cs:line 783 at Octokit.ApiConnection.Patch[T](Uri uri, Object data) in /_/Octokit/Http/ApiConnection.cs:line 520 at Build.<get_AssignLabelsToPullRequest>b__20_4() in /home/runner/work/dd-trace-php/dd-trace-php/github-actions-helpers/Build.Github.cs:line 240 {"message":"Resource not accessible by integration","documentation_url":"https://docs.github.com/rest/issues/issues#update-an-issue","status":"403"}

The target framework 'net7.0' is out of support and will not receive security updates in the future. Please refer to https://aka.ms/dotnet-core-support for more information about the support policy.

The target framework 'net7.0' is out of support and will not receive security updates in the future. Please refer to https://aka.ms/dotnet-core-support for more information about the support policy.

The target framework 'net7.0' is out of support and will not receive security updates in the future. Please refer to https://aka.ms/dotnet-core-support for more information about the support policy.

The target framework 'net7.0' is out of support and will not receive security updates in the future. Please refer to https://aka.ms/dotnet-core-support for more information about the support policy.

The target framework 'net7.0' is out of support and will not receive security updates in the future. Please refer to https://aka.ms/dotnet-core-support for more information about the support policy.