docs(slurm_ops): update todos

Apply formatting to the TODO messages so that they render
nicely within tool windows such as PyCharm's TODO widget. Easy
to quickly browse through outstanding items we want to tackle.

Signed-off-by: Jason C. Nucciarone <[email protected]>

lib/charms/hpc_libs/v0/slurm_ops.py

@@ -721,6 +721,8 @@ def generate(self) -> None:
         )
 
 
+# TODO: https://github.com/charmed-hpc/mungectl/issues/5 -
+#  Have `mungectl` set user and group permissions on the munge.key file.
 class _MungeKeyManager:
     """Control the munge key via `mungectl ...` commands."""