orchestra/opsys: release shift to 9.6 for rocky and alma linux

The release 9.5 is gone and all files removed on RockyLinux
and AlmaLinux sites, so just update defaults to the latest.

Signed-off-by: Kyr Shatskyy <kyrylo.shatskyy@clyso.com>

Author: Kyr Shatskyy

teuthology/orchestra/opsys.py

@@ -36,11 +36,12 @@
     },
     "alma": {
         "8.10": "alma",
-        "9.5": "alma",
+        "9.6": "alma",
+        "10.0": "alma",
     },
     "rocky": {
         "8.10": "rocky",
-        "9.5": "rocky",
+        "9.6": "rocky",
         "10.0": "rocky",
     },
     "centos": {
@@ -92,8 +93,8 @@
     opensuse="15.4",
     sle="15.2",
     rhel="8.6",
-    rocky="9.5",
-    alma="9.5",
+    rocky="9.6",
+    alma="9.6",
     debian='8.0'
 )