TPA-RFC-73: Sort dependency graph classes (cosmetic)

With a unique sorted class list, future changes in actions will be less
cumbersome.

refs team#41721

policy/tpa-rfc-73-tails-infra-merge-roadmap.md

@@ -1001,54 +1001,51 @@ flowchart TD
     Deferred --> PuppetCodebase{{Consolidated Puppet codebase}}
     PuppetCodebase --> Virtualization([Virtualization]) ~~~ Captions
 
+    class AptRepository merge
+    class AptSnapshots keep
+    class Authentication merge
+    class Backups migrate
+    class BitTorrent keep
     class Bitcoin retire
-    class VPN retire
-    class TorBridge retire
-
+    class Calendar migrate
+    class Colocations keep
+    class CommitSigning keep
     class DNS migrate
-    class Firewall migrate
-    class Backups migrate
+    class DNS migrate
+    class Documentation merge
+    class Eyaml keep
     class EyamlTrocla migrate
-    class git-annex migrate
+    class Firewall migrate
+    class GitLab merge
     class Gitolite migrate
-    class Monitoring migrate
-    class DNS migrate
-    class TLS migrate
-    class Calendar migrate
-    class Jenkins migrate
-    class XMPP migrate
-    class XmppBot migrate
-    class MirrorPool migrate
-
-    class CommitSigning keep
-    class Colocations keep
-    class TorPuppet7 keep
     class HedgeDoc keep
+    class HybridPuppet merge
     class IsoHistory keep
-    class TbArchive keep
-    class BitTorrent keep
-    class WhisperBack keep
-    class AptSnapshots keep
-    class Schleuder keep
-    class Registrars keep
-    class Virtualization keep
-
-    class Authentication merge
-    class Documentation merge
-    class Eyaml merge
-    class PasswordStore merge
-    class AptRepository merge
+    class Jenkins migrate
     class LimeSurvey merge
-    class Mailman merge
     class MTA merge
-    class GitLab merge
-    class SecurityPolicy merge
+    class Mailman merge
+    class MirrorPool migrate
+    class Monitoring migrate
+    class PasswordStore merge
+    class PuppetCodebase merge
     class PuppetModules merge
+    class Registrars keep
+    class Schleuder keep
+    class SecurityPolicy merge
+    class TLS migrate
+    class TbArchive keep
+    class TorBridge retire
+    class TorPuppet7 keep
+    class VPN retire
+    class Virtualization keep
     class WebServer merge
-    class PuppetCodebase merge
-    class HybridPuppet merge
     class Weblate merge
     class Website merge
+    class WhisperBack keep
+    class XMPP migrate
+    class XmppBot migrate
+    class git-annex migrate
 ```
 
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