Frequently asked questions about Perl

Changes for 5.20230812 - 2023-08-12T21:30:12Z

• some typo fixes to perlfaq4 (PR #103 and PR#104, brian d foy)
• some wording improvements to perlfaq4 for "Why doesn't & work the way I want it to?" (PR#104, resolves issue #101, brian d foy)
• some updates to perlfaq2 for perl magazines (PR#105, brian d foy)