Rollup merge of #33831 - diwic:patch-1, r=aturon

panic.rs: fix docs (recover -> catch_unwind)

The current docs are a bit inconsistent. First, change all references of "recover" to "catch_unwind" because the function was renamed. Second, consistently use the term "unwind safe" instead of "panic safe", "exception safe" and "recover safe" (all these terms were used previously).

diff --cc src/libstd/panic.rs
Simple merge