Limit the font-weight change to blog pages and standard pages pending confirmation from ben.

Author: helenb

tbx/static_src/sass/components/_streamfield.scss

@@ -8,11 +8,15 @@
 
         p {
             margin-bottom: $spacer-small;
-            font-weight: $weight--medium;
 
             &:last-child {
                 margin-bottom: 0;
             }
+
+            .template-standard-page &,
+            .template-blog-page & {
+                font-weight: $weight--medium;
+            }
         }
     }