Fixed chart updating error

[pandasamanvaya]

Thank you for your contribution to the KodaDot NFT gallery.
👇 _ Do a quick check before the merge.

PR type

• Bugfix
• Feature
• Refactoring

What's new?

• PR closes Weird chart error? #1755 BUYING NFT causes crash #1692
• Before rendering the price chart, a check is performed to remove any old chart if present on the canvas

Before submitting Pull Request, please make sure:

• My contribution builds clean without any errors or warnings
• I've merged recent default branch -- main-nuxt and I've no conflicts
• I've tried respect high code quality standards
• I've didn't break any original functionality
• I've posted screenshot of demonstrated change in this PR

Optional

• I've tested it at </rmrk/collection/26902bc2f7c20c546a-1FVG7>
• I've tested PR on mobile and everything seems works
• I found edge cases

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[yangwao]

Perfect, I’ve sent the payout https://kusama.subscan.io/extrinsic/0x191083c3ff0b9b009b466058f9a90bdcbddc4933ddeacdd8c8e334c6e283ab38

Let’s grab another issue and get rewarded!
https://github.com/kodadot/nft-gallery/issues/