rcgen: 0.13.1 -> 0.13.2 #1683

Job	Run time
Validate external types appearing in public API	1m 32s
build-windows	15m 24s
Build rustls-cert-gen as a standalone package	26s
build (macOS-latest, stable)	4m 1s
build (ubuntu-latest, stable)	5m 59s
Measure coverage	5m 57s
Documentation (stable)	54s
Format & clippy	5m 33s
Documentation (nightly)	1m 4s
build (ubuntu-latest, beta)	6m 23s
Check semver compatibility	3m 7s
build (ubuntu-latest, nightly)	6m 7s
build (ubuntu-latest, stable 7 months ago)	6m 16s
	1h 2m 43s

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