But it shows as a link, as a URL. I showed you a picture of what it looks like in the initial comment. The way you are formatting the code doesn't make sense and creates a broken URL that leads nowhere.
As I mentioned earlier, it would be better to simply show the deck code as plain text OR link to a proper GU Decks page.
The way you have it now it just makes the task of copying the code more difficult.
What gets copied is
https://gu_1_6_naucclkbgnaqcdccdqnbbcckbdyiaccdznbenbccaxnarnbbnavnbcnarnancdmnaucdmqakcclkbnqaliacgcokds/
and what needs to be copied is
gu_1_6_naucclkbgnaqcdccdqnbbcckbdyiaccdznbenbccaxnarnbbnavnbcnarnancdmnaucdmqakcclkbnqaliacgcokds
And then this code in small caps does not work in GU Decks or in the game client. A valid deck code looks like this
GU_1_1_NAVNAcNAjNAWNATNAcNAWMCYMCRMCYNAjMCRNAhNATNAVCCcNAhCCcCDSCDSNAZCEtCEtMCJMCJMCxNAiNAiCCbCCb