improve loaning stuff

_inventory/3ddrucker.md

_inventory/atem-mini-blau.md

_inventory/atem-mini-weiss.md

_inventory/aver-gamer-mini.md

_inventory/beamer2.md

_inventory/blackmagic-design-mv-bidirect-sdihdmi-3g-blau.md

_inventory/blackmagic-design-mv-bidirect-sdihdmi-3g-weiss.md

_inventory/elgato-capturecard.md

_inventory/elgato-stream-deck.md

_inventory/fraese.md

_inventory/heatpress.md

_inventory/labornetzteil.md

_inventory/loetstationen.md

_inventory/osziloskop.md

_inventory/plotter.md

_inventory/rode-blau.md

_inventory/rode-weiss.md

_inventory/schneidplotter.md

_inventory/sirui-sh-25-blau.md

_inventory/sirui-sh-25-weiss.md