js-sdk : fix: pass TLV value as hex from nwc webln provider to nwc client keysend (#229)
* fix: pass TLV value as hex from nwc webln provider to nwc client keysend
* fix: update nwc client keysend examples to pass TLV values as hex
* fix: typo
https://github.com/getAlby/js-sdk/commit/1621456843de1204f7afa7ba9bc60584fc708a42