update theme version (#95)

* update theme version

* add rtd preview action

Author: OriolAbril

.github/workflows/rtd-link-preview.yml

@@ -0,0 +1,16 @@
+name: Read the Docs Pull Request Preview
+on:
+  pull_request_target:
+    types:
+      - opened
+
+permissions:
+  pull-requests: write
+
+jobs:
+  documentation-links:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: readthedocs/actions/preview@v1
+        with:
+          project-slug: "pymcio"

requirements.txt

@@ -9,4 +9,4 @@ sphinx-notfound-page
 jupyterlite-sphinx
 jupyterlite-pyodide-kernel
 sphinxext-rediraffe
-pymc-sphinx-theme==0.13
+pymc-sphinx-theme==0.14