Adapt some test to new support in embedded block

Author: cderv

tests/docs/smoke-all/2024/09/24/issue-10821-b.qmd

@@ -5,7 +5,7 @@ _quarto:
   tests:
     html:
       ensureFileRegexMatches:
-        - ['<span class="in">#\| fig-cap: ''This figure will have ''''echo: fenced'''' in its caption.''</span>']
+        - ['<span class="co">#\| fig-cap: ''This figure will have ''''echo: fenced'''' in its caption.''</span>']
         - []
         # - ['fig-cap']
 ---

tests/docs/smoke-all/2024/09/24/issue-10821.qmd

@@ -5,7 +5,7 @@ _quarto:
   tests:
     html:
       ensureFileRegexMatches:
-        - ['<span class="in">#\| fig-cap: "This figure will have ''echo: fenced'' in its caption."</span>']
+        - ['<span class="co">#\| fig-cap: "This figure will have ''echo: fenced'' in its caption."</span>']
         - []
 ---