CompatHelper: bump compat for ILog2 to 2, (keep existing compat)

[github-actions]

This pull request changes the compat entry for the ILog2 package from 0.2.3 to 0.2.3, 2.
This keeps the compat entries for earlier versions.

Note: I have not tested your package with this new compat entry.
It is your responsibility to make sure that your package tests pass before you merge this pull request.

[Fe-r-oz]

After first commit 47daf7f (taken from https://github.com/QuantumSavory/QuantumClifford.jl/actions/runs/11189154315/job/31109128825#step:6:880):

ERROR: LoadError: Unsatisfiable requirements detected for package ILog2 [2cd5bd5f]:
 ILog2 [2cd5bd5f] log:
 ├─possible versions are: 0.2.1-2.0.0 or uninstalled
 ├─restricted to versions 0.2.3-0.2 by QuantumClifford [0525e862], leaving only versions: 0.2.3-0.2.4
 │ └─QuantumClifford [0525e862] log:
 │   ├─possible versions are: 0.9.11 or uninstalled
 │   └─QuantumClifford [0525e862] is fixed to version 0.9.11
 └─restricted to versions 2.0.0 by an explicit requirement — no versions left

After second commit 33b43e3 (taken from https://github.com/QuantumSavory/QuantumClifford.jl/actions/runs/11189761528/job/31110573082?pr=380#step:6:879):

ERROR: LoadError: Unsatisfiable requirements detected for package ILog2 [2cd5bd5f]:
 ILog2 [2cd5bd5f] log:
 ├─possible versions are: 0.2.1-2.0.0 or uninstalled
 ├─restricted to versions 0.2.3-0.2 by QuantumClifford [0525e862], leaving only versions: 0.2.3-0.2.4
 │ └─QuantumClifford [0525e862] log:
 │   ├─possible versions are: 0.9.11 or uninstalled
 │   └─QuantumClifford [0525e862] is fixed to version 0.9.11
 └─restricted to versions 2.0.0 by an explicit requirement — no versions left

Maybe adding ILog2 = "0.2.3, 0.2.4, 1, 2" might help based on the ERROR log shown above? I hope this helps.