Add v5.32 to the matrix of Perl versions we test against.

`perl:latest` is now v5.34, so let's explicitly add v5.32 to the test
matrix.

Author: bleargh45

.github/workflows/perl-ci.yml

@@ -52,6 +52,7 @@ jobs:
       matrix:
         perl-version:
           - "latest"
+          - "5.32"
           - "5.30"
           - "5.28"
           - "5.26"