Fix a few typos found by codespell (#3543)

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## Summary

Just fix typos.

While `alpha-numeric` is not really a misspelling:
- it is missing from mainstream curated dictionaries, all of them
suggest `alphanumeric`;
- it is less used than `alphanumeric` (more than ⨉10 less) according to
the Google [Ngram
Viewer](https://books.google.com/ngrams/graph?content=alpha-numeric%2Calphanumeric&year_start=1900&year_end=2019&corpus=en-2019);
- it is [missing from
SCOWL](http://app.aspell.net/lookup?dict=en_US-large;words=alpha-numeric).

## Test Plan

CI jobs.

crates/uv-client/src/httpcache/mod.rs

@@ -117,7 +117,7 @@ This is a little extra cost, but the idea is that a `CachePolicy` (not an
 `ArchivedCachePolicy`) should only be used in the slower path (i.e., when you
 actually need to make an HTTP request).
 
-[`rkyv::vec::ArchivedVec`]: hhttps://docs.rs/rkyv/0.7.43/rkyv/vec/struct.ArchivedVec.html
+[`rkyv::vec::ArchivedVec`]: https://docs.rs/rkyv/0.7.43/rkyv/vec/struct.ArchivedVec.html
 [`rkyv::string::ArchivedString`]: https://docs.rs/rkyv/0.7.43/rkyv/string/struct.ArchivedString.html
 
 # Additional reading