chore(examples/gnoland): fix gnoland/home realm, rename the blog (#3177)

<!-- please provide a detailed description of the changes made in this
pull request. -->

## Description

Fixes a broken link on the home page and renames the gno.land blog. 

Two options for the blog name:
- gno.land's blog
- The Gno Blog

Option 1 seems favorable.

<details><summary>Contributors' checklist...</summary>

- [x] Added new tests, or not needed, or not feasible
- [x] Provided an example (e.g. screenshot) to aid review or the PR is
self-explanatory
- [x] Updated the official documentation or not needed
- [x] No breaking changes were made, or a `BREAKING CHANGE: xxx` message
was included in the description
- [x] Added references to related issues and PRs
- [x] Provided any useful hints for running manual tests
</details>

examples/gno.land/r/gnoland/blog/gnoblog.gno

@@ -7,7 +7,7 @@ import (
 )
 
 var b = &blog.Blog{
-	Title:  "Gnoland's Blog",
+	Title:  "gno.land's blog",
 	Prefix: "/r/gnoland/blog:",
 }
 

examples/gno.land/r/gnoland/blog/gnoblog_test.gno

@@ -15,7 +15,7 @@ func TestPackage(t *testing.T) {
 	{
 		got := Render("")
 		expected := `
-# Gnoland's Blog
+# gno.land's blog
 
 No posts.
 `
@@ -28,7 +28,7 @@ No posts.
 		ModAddPost("slug2", "title2", "body2", "2022-05-20T13:17:23Z", "moul", "tag1,tag3")
 		got := Render("")
 		expected := `
-	# Gnoland's Blog
+	# gno.land's blog
 
 <div class='columns-3'><div>
 
@@ -59,7 +59,7 @@ Tags: [#tag1](/r/gnoland/blog:t/tag1) [#tag3](/r/gnoland/blog:t/tag3)
 
 Written by moul on 20 May 2022
 
-Published by g1manfred47kzduec920z88wfr64ylksmdcedlf5 to Gnoland's Blog
+Published by g1manfred47kzduec920z88wfr64ylksmdcedlf5 to gno.land's blog
 
 ---
 <details><summary>Comment section</summary>
@@ -74,12 +74,12 @@ Published by g1manfred47kzduec920z88wfr64ylksmdcedlf5 to Gnoland's Blog
 	// list by tags.
 	{
 		got := Render("t/invalid")
-		expected := "# [Gnoland's Blog](/r/gnoland/blog:) / t / invalid\n\nNo posts."
+		expected := "# [gno.land's blog](/r/gnoland/blog:) / t / invalid\n\nNo posts."
 		assertMDEquals(t, got, expected)
 
 		got = Render("t/tag2")
 		expected = `
-# [Gnoland's Blog](/r/gnoland/blog:) / t / tag2
+# [gno.land's blog](/r/gnoland/blog:) / t / tag2
 
 <div>
 
@@ -110,7 +110,7 @@ Tags: [#tag1](/r/gnoland/blog:t/tag1) [#tag3](/r/gnoland/blog:t/tag3)
 
 Written by moul on 20 May 2022
 
-Published by g1manfred47kzduec920z88wfr64ylksmdcedlf5 to Gnoland's Blog
+Published by g1manfred47kzduec920z88wfr64ylksmdcedlf5 to gno.land's blog
 
 ---
 <details><summary>Comment section</summary>
@@ -152,7 +152,7 @@ Tags: [#tag1](/r/gnoland/blog:t/tag1) [#tag4](/r/gnoland/blog:t/tag4)
 
 Written by manfred on 20 May 2022
 
-Published by g1manfred47kzduec920z88wfr64ylksmdcedlf5 to Gnoland's Blog
+Published by g1manfred47kzduec920z88wfr64ylksmdcedlf5 to gno.land's blog
 
 ---
 <details><summary>Comment section</summary>

examples/gno.land/r/gnoland/home/home.gno

@@ -95,7 +95,7 @@ func latestHOFItems(num int) ui.Element {
 	submissions := hof.RenderExhibWidget(num)
 
 	return ui.Element{
-		ui.H3("[Hall of Fame](/r/demo/hof)"),
+		ui.H3("[Hall of Fame](/r/leon/hof)"),
 		ui.Text(submissions),
 	}
 }

examples/gno.land/r/gnoland/home/home_filetest.gno

@@ -78,7 +78,7 @@ func main() {
 // </div><!-- /column-->
 // <div class="column">
 //
-// ### [Hall of Fame](/r/demo/hof)
+// ### [Hall of Fame](/r/leon/hof)
 //
 //
 // </div><!-- /column-->

examples/gno.land/r/gov/dao/v2/prop2_filetest.gno

@@ -82,7 +82,7 @@ func main() {
 //
 //
 // --
-// # Gnoland's Blog
+// # gno.land's blog
 //
 // No posts.
 // --
@@ -101,7 +101,7 @@ func main() {
 //
 //
 // --
-// # Gnoland's Blog
+// # gno.land's blog
 //
 // <div class='columns-3'><div>
 //