fix: Add UTF-8 content type for bookmarks export (#1912)

Author: jocmp

capy/src/main/java/com/jocmp/capy/StarredBookmarksFile.kt

@@ -14,6 +14,7 @@ class StarredBookmarksFile(
         buildString {
             appendLine("<!DOCTYPE NETSCAPE-Bookmark-file-1>")
             appendLine("<!-- This is an automatically generated file. -->")
+            appendLine("<META HTTP-EQUIV=\"Content-Type\" CONTENT=\"text/html; charset=UTF-8\">")
             appendLine("<TITLE>Starred Articles</TITLE>")
             appendLine("<H1>Starred Articles</H1>")
             appendLine("<DL><p>")

capy/src/test/java/com/jocmp/capy/StarredBookmarksFileTest.kt

@@ -42,6 +42,7 @@ class StarredBookmarksFileTest {
         val expected = """
             |<!DOCTYPE NETSCAPE-Bookmark-file-1>
             |<!-- This is an automatically generated file. -->
+            |<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=UTF-8">
             |<TITLE>Starred Articles</TITLE>
             |<H1>Starred Articles</H1>
             |<DL><p>
@@ -87,6 +88,7 @@ class StarredBookmarksFileTest {
         val expected = """
             |<!DOCTYPE NETSCAPE-Bookmark-file-1>
             |<!-- This is an automatically generated file. -->
+            |<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=UTF-8">
             |<TITLE>Starred Articles</TITLE>
             |<H1>Starred Articles</H1>
             |<DL><p>