ci(deps): bump actions/configure-pages from 5 to 6 #219

Job	Run time
Agent inventory (144 target)	5s
Test hooks (unit)	14s
Shell script lint	14s
Template build smoke (B1+B2 regression guard)	20s
Verify plugin structure (macos-14)	17s
Verify plugin structure (ubuntu-latest)	20s
	1m 30s

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