Bump dnspython to 2.6.1 to fix pack CI failure on py3.10/py3.11

Author: nzlosh

CHANGELOG.rst

@@ -59,6 +59,9 @@ Changed
 * Update CI from testing with mongo 4.4 to testing with MongoDB 7.0. #6246
   Contributed by @guzzijones
 
+* Bump `dnspython` 1.16.0 -> 2.6.1 to correctly support python 3.10 and greater. #6265
+  Contributed by @nzlosh
+
 Added
 ~~~~~
 * Continue introducing `pants <https://www.pantsbuild.org/docs>`_ to improve DX (Developer Experience)

fixed-requirements.txt

@@ -5,7 +5,7 @@ apscheduler==3.10.4
 chardet==3.0.4
 cffi==1.17.1
 # NOTE: 2.0 version breaks pymongo work with hosts
-dnspython==1.16.0
+dnspython==2.6.1
 cryptography==43.0.1
 eventlet==0.37.0
 flex==6.14.1

lockfiles/st2-constraints.txt

@@ -63,10 +63,10 @@ MarkupSafe<2.1.0,>=0.23
 #decorator==4.4.2
 
 # REQUIRED BY: eventlet, pymongo
-# REASON: 2.0 version breaks pymongo work with hosts
+# REASON: version 2.6.1 is required to support python from 3.8 to 3.11
 # NOTE: try to remove this later
 # DROPS RESOLVED VERSION: 1.16
-dnspython>=1.16.0,<2.0.0
+dnspython==2.6.1
 
 # REQUIRED BY: eventlet
 # REASON: eventlet is difficult to upgrade.