chore(ci): disable js-ipfs interop

Does not make sense to have CI red all the time.

Restoring interop with js-ipfs is tracked in:
#1737

.github/workflows/ci.yml

@@ -143,7 +143,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        backend: [js, go]
+        backend: [go] # TODO: add 'js' – see https://github.com/ipfs/ipfs-webui/issues/1737
     steps:
       - uses: actions/checkout@v2