Default path to bazel-complete.bash not aligned with bazel docs

[alexander-born]

The target completion did not work without explicitly setting the path via

bazel#SetBashCompletionPath('/etc/bash_completion.d/bazel-complete.bash')

I would suggest to change the default path according to the docs https://docs.bazel.build/versions/main/completion.html:

 if !exists('s:bash_completion_path')
-  let s:bash_completion_path = '/etc/bash_completion.d/bazel'
+  let s:bash_completion_path = '/etc/bash_completion.d/bazel-complete.bash'
 endif

See:

vim-bazel/autoload/bazel.vim

Line 9 in 58c750d

let s:bash_completion_path = '/etc/bash_completion.d/bazel'