go.mod: update to github.com/yuin/goldmark@1.4.13

Updating golang.org/x/vuln will result in this update.
Separating it into a separate CL to isolate the change to readme_test.go.

Change-Id: I1ba14700dc3f1ecd1f05469a6d9694b2fa3ecf2a
Reviewed-on: https://go-review.googlesource.com/c/pkgsite/+/425200
TryBot-Result: kokoro <noreply+kokoro@google.com>
Reviewed-by: Julie Qiu <julieqiu@google.com>
Run-TryBot: Damien Neil <dneil@google.com>
diff --git a/go.mod b/go.mod
index 1d3ed31..38d2621 100644
--- a/go.mod
+++ b/go.mod
@@ -33,7 +33,7 @@
 	github.com/lib/pq v1.10.2
 	github.com/microcosm-cc/bluemonday v1.0.5
 	github.com/russross/blackfriday/v2 v2.1.0
-	github.com/yuin/goldmark v1.4.0
+	github.com/yuin/goldmark v1.4.13
 	github.com/yuin/goldmark-emoji v1.0.1
 	go.opencensus.io v0.23.0
 	golang.org/x/mod v0.5.1
diff --git a/go.sum b/go.sum
index bc187d5..1030ddd 100644
--- a/go.sum
+++ b/go.sum
@@ -1058,8 +1058,8 @@
 github.com/yuin/goldmark v1.1.32/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.3.5/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
-github.com/yuin/goldmark v1.4.0 h1:OtISOGfH6sOWa1/qXqqAiOIAO6Z5J3AEAE18WAq6BiQ=
-github.com/yuin/goldmark v1.4.0/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
+github.com/yuin/goldmark v1.4.13 h1:fVcFKWvrslecOb/tg+Cc05dkeYx540o0FuFt3nUVDoE=
+github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
 github.com/yuin/goldmark-emoji v1.0.1 h1:ctuWEyzGBwiucEqxzwe0SOYDXPAucOrE9NQC18Wa1os=
 github.com/yuin/goldmark-emoji v1.0.1/go.mod h1:2w1E6FEWLcDQkoTE+7HU6QF1F6SLlNGjRIBbIZQFqkQ=
 github.com/yuin/gopher-lua v0.0.0-20200816102855-ee81675732da h1:NimzV1aGyq29m5ukMK0AMWEhFaL/lrEOaephfuoiARg=
diff --git a/internal/frontend/readme_test.go b/internal/frontend/readme_test.go
index 6a7396a..ec4003b 100644
--- a/internal/frontend/readme_test.go
+++ b/internal/frontend/readme_test.go
@@ -290,7 +290,7 @@
 				Filepath: "README.md",
 				Contents: "<img src=\"resources/logoSmall.png\" />\n\n# Heading\n",
 			},
-			wantHTML: `<p><img src="https://github.com/valid/module_name/raw/v1.0.0/resources/logoSmall.png"/></p>` + "\n" +
+			wantHTML: `<img src="https://github.com/valid/module_name/raw/v1.0.0/resources/logoSmall.png"/>` + "\n" +
 				`<h3 class="h1" id="readme-heading">Heading</h3>`,
 			wantOutline: []*Heading{
 				{Level: 1, Text: "Heading", ID: "readme-heading"},