docs: fix typos (#1705)

## Summary

Fix typos found via `codespell -S
*.txt,*.yaml,generate_kerning_ligature_epub.py -L
currenty,flate,ser,localy,logicaly,ans,clen,portugues,notin,curren`

## Additional Context

* Add any other information that might be helpful for the reviewer
(e.g., performance implications, potential risks,
  specific areas to focus on).

---

### AI Usage

While CrossPoint doesn't have restrictions on AI tools in contributing,
please be transparent about their usage as it helps set the right
context for reviewers.

Did you use AI tools to help write this code? _**NO**_

---------

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

lib/uzlib/src/tinflate.c

@@ -612,7 +612,7 @@ next_blk:
 
         if (res == TINF_DONE && !d->bfinal) {
             /* the block has ended (without producing more data), but we
-               can't return without data, so start procesing next block */
+               can't return without data, so start processing next block */
             goto next_blk;
         }