Credit Adisankar Manoj Thanuja as translator of the ml edition (#10)

quantecon-book-theme v0.22.0 adds a `translators` theme option, parallel to
`authors`, so a translated edition can credit the people who produced it in
the page header. This edition's Malayalam text is the work of Adisankar Manoj
Thanuja, who is already recorded as the primary editor in `.translate/config.yml`.

Bumps the theme pin from 0.21.0 to 0.22.0, which is what makes the option do
anything, and adds the single-entry `translators` list. The `translators_label`
default ("Translated by") is left in place for now; localising it to Malayalam
is a separate call best made by a native speaker.

See QuantEcon/quantecon-book-theme#426

Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: mmcky

environment.yml

@@ -11,7 +11,7 @@ dependencies:
   - pip
   - pip:
     - jupyter-book>=1.0.4post1,<2.0
-    - quantecon-book-theme==0.21.0
+    - quantecon-book-theme==0.22.0
     - sphinx-tojupyter==0.6.0
     - sphinxext-rediraffe==0.3.0
     - sphinx-exercise==1.2.1

lectures/_config.yml

@@ -59,6 +59,9 @@ sphinx:
           url: http://www.tomsargent.com/
         - name: John Stachurski
           url: https://johnstachurski.net/      
+      translators:
+        - name: Adisankar Manoj Thanuja
+          url: https://www.linkedin.com/in/adisankar-m-t/
       dark_logo: quantecon-logo-transparent.png
       header_organisation_url: https://quantecon.org
       header_organisation: QuantEcon