CI: Remove branch conditional from nightly Android build

Apart from the fact that this workflow is failing every time, we don't
need to check the branch we're on since it's only invoked for the
default branch of the repository. We can also remove the `always()`
since there are no job dependencies nor do we want this to be
uncancelable.

.github/workflows/nightly-android.yml

@@ -20,7 +20,7 @@ concurrency:
 jobs:
   CI:
     runs-on: ${{ matrix.os }}
-    if: always() && github.repository == 'LadybirdBrowser/ladybird' && github.ref == 'refs/heads/master'
+    if: github.repository == 'LadybirdBrowser/ladybird'
     strategy:
       fail-fast: false
       matrix: