[updatecli] Bump Fleet version used within installation documentation to 0.10.3

[rancherbot]

INSTALLATION.YAML

Update Fleet asset URL

1 file(s) updated with "https://github.com/rancher/fleet/releases/download/v0.10.3/fleet-0.10.3.tgz": * README.md

0.10.3

Release published on the 2024-09-30 10:56:25 +0000 UTC at the url https://github.com/rancher/fleet/releases/tag/v0.10.3

## Notes

The cronjob to clean up outdated git cloning jobs, is using the wrong service account. `serviceAccountName` in the job template needs to be switched to the "gitjob" service account. Doing this edit in the Rancher UI didn't work while testing. 

Upgrading to the chart via the Rancher UI will not set new  Helm values, so `migrations.gitrepoJobsCleanup` will not be enabled. Customizing the Fleet installation options via the `rancher-config` configmap will work.

## What's Changed

* Increase worker count for reconcilers  by @manno  ([4b147db](https://github.com/rancher/fleet/commit/4b147db2ef644b012325dadd3c456cc781678374))
* Increase visibility of gitjob controller logs and events by @weyfonk  (#2911)
* Cleanup completed gitrepo jobs by @manno  (#2910)

**Full Changelog**: https://github.com/rancher/fleet/compare/v0.10.2...v0.10.3

Update Fleet CRD asset URL

1 file(s) updated with "https://github.com/rancher/fleet/releases/download/v0.10.3/fleet-crd-0.10.3.tgz": * README.md

0.10.3

Release published on the 2024-09-30 10:56:25 +0000 UTC at the url https://github.com/rancher/fleet/releases/tag/v0.10.3

## Notes

The cronjob to clean up outdated git cloning jobs, is using the wrong service account. `serviceAccountName` in the job template needs to be switched to the "gitjob" service account. Doing this edit in the Rancher UI didn't work while testing. 

Upgrading to the chart via the Rancher UI will not set new  Helm values, so `migrations.gitrepoJobsCleanup` will not be enabled. Customizing the Fleet installation options via the `rancher-config` configmap will work.

## What's Changed

* Increase worker count for reconcilers  by @manno  ([4b147db](https://github.com/rancher/fleet/commit/4b147db2ef644b012325dadd3c456cc781678374))
* Increase visibility of gitjob controller logs and events by @weyfonk  (#2911)
* Cleanup completed gitrepo jobs by @manno  (#2910)

**Full Changelog**: https://github.com/rancher/fleet/compare/v0.10.2...v0.10.3

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