[css-grid] markup fixes

Author: fantasai

css-grid-1/Overview.bs

@@ -1156,7 +1156,7 @@ Grid Items</h2>
 					<td>Fill grid area
 					<td>Fill grid area
 				<tr>
-					<th scope=row>''align-self/start''/<l spec=css-align-3>''align-self/center''</l>/etc.
+					<th scope=row>''align-self/start''/''align-self/center''/etc.
 					<td>''width/fit-content'' sizing (like floats)
 					<td>Use intrinsic size
 		</table>
@@ -4671,7 +4671,7 @@ Changes</h2>
 	This section documents the changes since previous publications.
 
 <h3 id="changes-202008">
-Changes since the <a href="https://www.w3.org/TR/2020/CR-css-grid-1-20200818/">18 August 2020 CR</h3>
+Changes since the <a href="https://www.w3.org/TR/2020/CR-css-grid-1-20200818/">18 August 2020 CR</a></h3>
 
 	<ul class="non-normative">
 		<li id="change-2020-align-normal-aspect-ratio">

css-grid-2/Overview.bs

@@ -1203,7 +1203,7 @@ Grid Items</h2>
 					<td>Fill grid area
 					<td>Fill grid area
 				<tr>
-					<th scope=row>''align-self/start''/<l spec=css-align-3>''align-self/center''</l>/etc.
+					<th scope=row>''align-self/start''/''align-self/center''/etc.
 					<td>''width/fit-content'' sizing (like floats)
 					<td>Use intrinsic size
 		</table>
@@ -5308,7 +5308,7 @@ Privacy and Security Considerations {#priv-sec}
 Changes</h2>
 
 <h3 id="changes-202008">
-Changes since the <a href="https://www.w3.org/TR/2020/CR-css-grid-2-20200818/">August 2020 CR</h3>
+Changes since the <a href="https://www.w3.org/TR/2020/CR-css-grid-2-20200818/">August 2020 CR</a></h3>
 
 	<ul class="non-normative">
 		<li id="change-2020-align-normal-aspect-ratio">