build(deps): update pygithub requirement from <2.5.0,>2.0.0 to >2.0.0,<2.6.0 in /requirements (#2835)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements/_tests.txt

@@ -13,7 +13,7 @@ pytest-xdist ==3.6.1
 phmdoctest ==1.4.0
 
 psutil ==6.*
-pyGithub >2.0.0, <2.5.0
+pyGithub >2.0.0, <2.6.0
 fire ==0.7.*
 
 cloudpickle >1.3, <=3.1.0