.github: Bump actions/setup-python from 4 to 6

Dependabot couldn't find the original pull request head commit, a00530a.

Author: dependabot[bot]

.github/workflows/create-backport-trackers.yml

@@ -43,7 +43,7 @@ jobs:
               src/script/backport-create-issue
               src/script/requirements.backport-create-issue.txt
           sparse-checkout-cone-mode: false
-      - uses: actions/setup-python@42375524e23c412d93fb67b49958b491fce71c38 # v5.4.0
+      - uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
         with:
           python-version: '>=3.6 <3.12'
           cache: 'pip'

.github/workflows/diff-ceph-config.yml

@@ -45,7 +45,7 @@ jobs:
           echo "COMMON_ANCESTOR_SHA=${COMMON_ANCESTOR_SHA}" >> $GITHUB_ENV
 
       - name: Setup Python
-        uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 #v5.6.0
+        uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c #v6.0.0
         with:
           python-version: '3.13'
 

.github/workflows/redmine-upkeep.yml

@@ -52,7 +52,7 @@ jobs:
           fetch-depth: 0
 
       - name: Setup Python
-        uses: actions/setup-python@42375524e23c412d93fb67b49958b491fce71c38 # v5.4.0
+        uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
         with:
           python-version: '3.9'
           cache: 'pip'