Update pyzotero requirement from <=1.6.2 to <=1.6.3

Updates the requirements on [pyzotero](https://github.com/urschrei/pyzotero) to permit the latest version.
- [Release notes](https://github.com/urschrei/pyzotero/releases)
- [Commits](urschrei/pyzotero@v0.3...v1.6.3)

---
updated-dependencies:
- dependency-name: pyzotero
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

pyproject.toml

@@ -22,7 +22,7 @@ classifiers = [
 dependencies = [
     "pyparsing <= 3.2.1",
     "pandas <= 2.2.3",
-    "pyzotero <= 1.6.2",
+    "pyzotero <= 1.6.3",
     "networkx <= 3.4.2",
     "matplotlib <= 3.10.0"
 ]