docs: update community Slack URL to point to Discourse invite thread (#18222)
docs: update community Slack URL to point to Discourse invite thread (#18222)


gerhardberger/electron,gerhardberger/electron,gerhardberger/electron,the-ress/electron,the-ress/electron,seanchas116/electron,seanchas116/electron,seanchas116/electron,electron/electron,electron/electron,bpasero/electron,the-ress/electron,electron/electron,the-ress/electron,seanchas116/electron,gerhardberger/electron,bpasero/electron,electron/electron,bpasero/electron,the-ress/electron,gerhardberger/electron,the-ress/electron,electron/electron,seanchas116/electron,the-ress/electron,bpasero/electron,electron/electron,gerhardberger/electron,bpasero/electron,electron/electron,bpasero/electron,bpasero/electron,gerhardberger/electron,seanchas116/electron