Module zfs not found in /lib/modules/5.15.90

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### Windows Version

Windows version: 10.0.19045.2846

### WSL Version

WSL version: 1.2.5.0 Kernel version: 5.15.90.1

### Are you using WSL 1 or WSL 2?

- [X] WSL 2
- [ ] WSL 1

### Kernel Version

5.15.90.1

### Distro Version

Ubuntu 22.04(**I use ubuntu-upgrade-commands from 20.04 to 22.04, so my distro shows the system icon `Ubuntu 20.04`**)

### Other Software

_No response_

### Repro Steps

I build and run zfs based on [the doc](https://openzfs.github.io/openzfs-docs/Developer%20Resources/Building%20ZFS.html#configure-and-build) from zfs.

```sh
cd ./zfs
git checkout master
sh autogen.sh
./configure
make -s -j$(nproc)
```

And I also get the kernel file from the github with the version of 5.15.90.1 and compile it.

### Expected Behavior

None.

### Actual Behavior

Then I exec `modprobe zfs` and it throws the error `modprobe: FATAL: Module zfs not found in directory /lib/modules/5.15.90.1-microsoft-standard-WSL2`.

I see the /lib/modules dir and find that the only dir in it is `5.15.0-72-generic`.
And I get the `extra` dir and the `zfs.ko` file with the same as [make install](https://openzfs.github.io/openzfs-docs/Developer%20Resources/Building%20ZFS.html#install).

```sh
/usr/src # ls root@DESKTOP-CO31SAO
googletest gtest linux-headers-5.15.0-72 linux-headers-5.15.0-72-generic zfs-2.1.5
/usr/src # cd /lib/modules
/lib/modules # ls
5.15.0-72-generic
/lib/modules # uname -a
Linux DESKTOP-CO31SAO 5.15.90.1-microsoft-standard-WSL2 #1 SMP Fri Jan 27 02:56:13 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux
```

So it means I only have the `5.15.0-72-generic` dir.

### Diagnostic Logs

_No response_

Start with the reported WSL kernel version from `uname -a` and compare it with the only directory under `/lib/modules`; then review the linked OpenZFS build and install documentation and the reproduced `modprobe zfs` failure. Done means establishing why the built module is not found for the running WSL2 kernel and documenting a reproducible resolution.

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