content/static/css: align baseline for identifiers

The baseline for the identifier name and "add in <version" text are now
aligned.

Change-Id: I2995c8ab3942a8b333bdf7e9bc353d927460919d
Reviewed-on: https://go-review.googlesource.com/c/pkgsite/+/310130
Trust: Julie Qiu <julie@golang.org>
Run-TryBot: Julie Qiu <julie@golang.org>
Reviewed-by: Jamal Carvalho <jamal@golang.org>
diff --git a/content/static/css/stylesheet.css b/content/static/css/stylesheet.css
index cd29687..2c54976 100644
--- a/content/static/css/stylesheet.css
+++ b/content/static/css/stylesheet.css
@@ -1322,16 +1322,13 @@
 .Documentation-type h4,
 .Documentation-typeFunc h4,
 .Documentation-typeMethod h4 {
+  align-items: baseline;
   display: flex;
   justify-content: space-between;
-  position: relative;
 }
 .Documentation-sinceVersion {
-  bottom: 0;
   font-size: 1rem;
   font-weight: 400;
-  position: absolute;
-  right: 0;
 }
 
 .Documentation-constants br:last-of-type,