Don't skip pending versions in the 3.3 floor bump (#4087)

Four sublibraries were already ahead of the registry with a release pending
when #4085 patch-bumped them, leaving a hole. AutoMerge rejects those:

  Does not meet sequential version number guideline:
  version 2.6.1 skips over 2.6.0

Reverts those four to their pending versions, which already carry the new
OrdinaryDiffEqDifferentiation floor. The other nine were at registry+1 and
are unaffected.

Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: ChrisRackauckas

lib/DelayDiffEq/Project.toml

@@ -1,7 +1,7 @@
 name = "DelayDiffEq"
 uuid = "bcd4f6db-9728-5f36-b5f7-82caef46ccdb"
 authors = ["Chris Rackauckas <accounts@chrisrackauckas.com>"]
-version = "6.1.2"
+version = "6.1.1"
 
 [deps]
 ArrayInterface = "4fba245c-0d91-5ea0-9b3e-6abc04ee57a9"

lib/OrdinaryDiffEqBDF/Project.toml

@@ -1,7 +1,7 @@
 name = "OrdinaryDiffEqBDF"
 uuid = "6ad6398a-0878-4a85-9266-38940aa047c8"
 authors = ["ParamThakkar123 <paramthakkar864@gmail.com>"]
-version = "2.4.2"
+version = "2.4.1"
 
 [deps]
 FastBroadcast = "7034ab61-46d4-4ed7-9d0f-46aef9175898"

lib/OrdinaryDiffEqNonlinearSolve/Project.toml

@@ -1,7 +1,7 @@
 name = "OrdinaryDiffEqNonlinearSolve"
 uuid = "127b3ac7-2247-4354-8eb6-78cf4e7c58e8"
 authors = ["Chris Rackauckas <accounts@chrisrackauckas.com>", "Yingbo Ma <mayingbo5@gmail.com>"]
-version = "2.6.1"
+version = "2.6.0"
 
 [deps]
 NonlinearSolve = "8913a72c-1f9b-4ce2-8d82-65094dcecaec"

lib/OrdinaryDiffEqSDIRK/Project.toml

@@ -1,7 +1,7 @@
 name = "OrdinaryDiffEqSDIRK"
 uuid = "2d112036-d095-4a1e-ab9a-08536f3ecdbf"
 authors = ["ParamThakkar123 <paramthakkar864@gmail.com>"]
-version = "2.8.3"
+version = "2.8.2"
 
 [deps]
 ConstructionBase = "187b0558-2788-49d3-abe0-74a17ed4e7c9"