zfs: support more fedora versions

roles/zfs/tasks/main.yml

@@ -25,7 +25,7 @@
   register: zfsload
 
 # does not adjust to 20% of each host, depends on consistency between hosts - inconsistency leads to disproportionate allocations
-- name: set zfs_arc_max to 20% installed memory ({{ zfs_arc_size_bytes }} bytes)
+- name: set zfs_arc_max to 20% of system memory
   lineinfile:
     path: "/etc/modprobe.d/zfs.conf"
     regexp: '^options zfs zfs_arc_max='

roles/zfs/tasks/zfs-release.yml

@@ -12,8 +12,8 @@
     state: present
   when: (ansible_distribution_major_version == "8")
 
-- name: install zfs-release package (Fedora)
+- name: install/upgrade zfs-release package (Fedora)
   dnf:
-    name: "http://download.zfsonlinux.org/fedora/zfs-release.fc31.noarch.rpm"
+    name: "http://download.zfsonlinux.org/fedora/zfs-release.fc{{ansible_distribution_major_version}}.noarch.rpm"
     state: present
   when: (ansible_distribution in ["Fedora"] and not is_atomic)