chore: Update the key ASCIIDOCTOR_PDF_VERSION in the test harness

Made with ❤️️ by updatecli

Author: asciidoctor-updateclibot[bot]

tests/asciidoctor.bats

@@ -4,7 +4,7 @@ TMP_GENERATION_DIR="${BATS_TEST_DIRNAME}/tmp"
 ALPINE_VERSION=3.22.2
 ASCIIDOCTOR_VERSION=2.0.25
 ASCIIDOCTOR_CONFLUENCE_VERSION=0.0.2
-ASCIIDOCTOR_PDF_VERSION=2.3.21
+ASCIIDOCTOR_PDF_VERSION=2.3.22
 ASCIIDOCTOR_DIAGRAM_VERSION=3.0.1
 ASCIIDOCTOR_EPUB3_VERSION=2.3.0
 ASCIIDOCTOR_FB2_VERSION=0.8.0