Add styling rule to field-list for vertical alignment

Author: Remy Wang

python_docs_theme/static/pydoctheme.css

@@ -426,6 +426,10 @@ div.footer a:hover {
     color: #0095c4;
 }
 
+dl.field-list > dt {
+    align-self: center;
+}
+
 /* C API return value annotations */
 :root {
     --refcount: var(--good-color);

python_docs_theme/static/pydoctheme_dark.css

@@ -77,6 +77,7 @@ span.highlighted {
 /* Below for most things in text */
 
 dl.field-list > dt {
+    align-self: center;
     background-color: #434;
 }