Increase table cell horizontal padding (go-gitea#26140)

Extract from go-gitea#26043, just the
padding increase.

Before and After (hard to notice, but it's there):
<img width="427" alt="Screenshot 2023-07-25 at 19 37 12"
src="https://github.com/go-gitea/gitea/assets/115237/9543dcda-eccb-4739-b7dd-06b076108ab4">
<img width="420" alt="Screenshot 2023-07-25 at 19 37 26"
src="https://github.com/go-gitea/gitea/assets/115237/0a9c3724-81a1-4c67-a13b-4b728a51fc3a">

Co-authored-by: Giteabot <teabot@gitea.io>

web_src/css/base.css

@@ -875,7 +875,7 @@ a.label,
 .ui.table > thead > tr > th,
 .ui.table > tbody > tr > td,
 .ui.table > tr > td {
-  padding: 6px 3px;
+  padding: 6px 5px;
 }
 /* use more horizontal padding on first and last items for visuals */
 .ui.table > thead > tr > th:first-of-type,