Upgrade Paket version to fix CI pack job

More info: fsprojects/Paket#4069

It was giving this error:
Microsoft (R) Build Engine version 16.11.0+0538acc04 for .NET
Copyright (C) Microsoft Corporation. All rights reserved.

/Users/runner/.dotnet/sdk/5.0.400/MSBuild.dll -maxcpucount -property:Configuration=Release -property:PackageOutputPath=/Users/runner/work/fantomless/fantomless/bin /p:Title=Fantomas /p:PackageVersion=4.5.1 /p:Authors=Florian Verdonck Jindřich Ivánek /p:Owners=Anh-Dung Phan /p:PackageRequireLicenseAcceptance=false /p:Description=This library aims at formatting F# source files based on a given configuration.
Fantomas will ensure correct indentation and consistent spacing between elements in the source files.
Some common use cases include
(1) Reformatting a code base to conform a universal page width
(2) Converting legacy code from verbose syntax to light syntax
(3) Formatting auto-generated F# signatures. /p:Summary=Source code formatter for F# /p:PackageReleaseNotes=Fix StackOverflow exceptions when collecting ColMultilineItem list. [fsprojects#1839](fsprojects#1839)
Honor .fantomasignore file when processing a folder. [fsprojects#1834](fsprojects#1834)
Fix Overly indented members on a record type with accessibility modifier. [fsprojects#1824](fsprojects#1824)
Fix MultiLineLambdaClosingNewline not respected with function keyword. [fsprojects#1823](fsprojects#1823)
Fix Comment is lost at the end of a match. [fsprojects#1822](fsprojects#1822) /p:Copyright=Copyright © 2021 /p:PackageTags=F# fsharp formatting beautifier indentation indenter /p:PackageProjectUrl=https://github.com/fsprojects/fantomas -target:pack -verbosity:m /bl:/var/folders/24/8k48jl6d249_n_qfxwsl6xvm0000gn/T/tmpZzrMRy.tmp.binlog /clp:ForceConsoleColor src/Fantomas/Fantomas.fsproj
  Fantomas -> /Users/runner/work/fantomless/fantomless/src/Fantomas/bin/Release/netstandard2.0/Fantomas.dll
  Paket version 6.0.0-rc006
  Total time taken: 0 milliseconds
/Users/runner/work/fantomless/fantomless/.paket/Paket.Restore.targets(370,15): error MSB4030: " " is an invalid value for the "NoDefaultExcludes" parameter of the "PackTask" task. The "NoDefaultExcludes" parameter is of type "System.Boolean". [/Users/runner/work/fantomless/fantomless/src/Fantomas/Fantomas.fsproj]
: /Users/runner/work/fantomless/fantomless/.paket/Paket.Restore.targets(370,15): error MSB4030: " " is an invalid value for the "NoDefaultExcludes" parameter of the "PackTask" task. The "NoDefaultExcludes" parameter is of type "System.Boolean".
Finished (Failed) 'DotNet:pack' in 00:00:16.4637972
Finished (Failed) 'Pack' in 00:00:16.4690846

.config/dotnet-tools.json

@@ -3,7 +3,7 @@
   "isRoot": true,
   "tools": {
     "paket": {
-      "version": "6.0.0-rc006",
+      "version": "6.0.13",
       "commands": [
         "paket"
       ]