Fix typo for python

Author: bobleesj

.github/workflows/publish-docs-on-release.yml

@@ -14,3 +14,4 @@ jobs:
       project: diffpy.pdffit2
       c_extension: true
       headless: false
+      python_version: 3.12

.github/workflows/tests-on-pr.yml

@@ -14,6 +14,6 @@ jobs:
       project: diffpy.pdffi2
       c_extension: false
       headless: true
-      pythno_version: 3.12
+      python_version: 3.12
     secrets:
       CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}