ci: fix Nix cache URL doc

Signed-off-by: Roman Volosatovs <rvolosatovs@riseup.net>

Author: rvolosatovs

.github/actions/install-nix/action.yml

@@ -2,7 +2,7 @@ name: install Nix
 
 inputs:
   cachixAuthToken:
-    description: auth token for https://app.cachix.org/organization/wasmcloud/cache/wrpc
+    description: auth token for https://app.cachix.org/organization/wasmcloud/cache/bytecodealliance
 
 runs:
   using: composite