update for 24.09

With the release of version 24.09, the Backend.AI webui docs require a version update.
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[sessions] : [docs: add session history feature, folder explorer and folder create modal descriptions #86](https://github.com/lablup/backend.ai-docs-webui/pull/86) @ironAiken2
[model_serving] : [docs: update images and add links to related page #87](https://github.com/lablup/backend.ai-docs-webui/pull/87) @ironAiken2
[import_run] : [docs: update images in import_run page #88](https://github.com/lablup/backend.ai-docs-webui/pull/88) @ironAiken2
[vfolder] : [docs: update vfolder images and descriptions #89](https://github.com/lablup/backend.ai-docs-webui/pull/89) @ironAiken2
[mount_vfolder] : [docs: use folder explorer and create a new folder in session launcher #90](https://github.com/lablup/backend.ai-docs-webui/pull/90) @ironAiken2
[share_vfolder] : [docs: update images and add description of default session launcher #91](https://github.com/lablup/backend.ai-docs-webui/pull/91) @ironAiken2
[user_settings] : [docs: update images and add 'classic session launcher' description #92](https://github.com/lablup/backend.ai-docs-webui/pull/92) @ironAiken2
[admin_menu] : [docs: update images and add 'resource policy setting in user modify modal` description #93](https://github.com/lablup/backend.ai-docs-webui/pull/93) @ironAiken2
[Appendix] : [docs: update images for neo session launcher #94](https://github.com/lablup/backend.ai-docs-webui/pull/94) @ironAiken2