[librsvg] Fix documentation links since developer.gnome.org is thoroughly changed now

[Federico Mena Quintero <federico src gnome org>]

commit 795abbbf2d7133e88d764197d21573c3728d3af9
Author: Federico Mena Quintero <federico gnome org>
Date:   Thu Aug 19 13:05:24 2021 -0500

    Fix documentation links since developer.gnome.org is thoroughly changed now

 ARCHITECTURE.md        | 2 +-
 README.md              | 2 +-
 SECURITY.md            | 2 +-
 doc/rsvg-docs.xml      | 2 +-
 src/accept_language.rs | 2 +-
 tests/README.md        | 2 +-
 6 files changed, 6 insertions(+), 6 deletions(-)
---
diff --git a/ARCHITECTURE.md b/ARCHITECTURE.md
index 0c142fd6..c4db9e9c 100644
--- a/ARCHITECTURE.md
+++ b/ARCHITECTURE.md
@@ -44,7 +44,7 @@ API/ABI.  It also exports a more idiomatic Rust API as well.
 
 [libart]: https://levien.com/libart/
 [Cairo]: https://www.cairographics.org/
-[GObject Introspection]: https://developer.gnome.org/platform-overview/unstable/tech-gobject.html.en
+[GObject Introspection]: https://gi.readthedocs.io/en/latest/
 [gi]: https://people.gnome.org/~federico/blog/magic-of-gobject-introspection.html
 
 # The C and Rust APIs
diff --git a/README.md b/README.md
index c259d0ec..22977b24 100644
--- a/README.md
+++ b/README.md
@@ -45,7 +45,7 @@ Introspection][gi].  This way, it is available in many programming
 languages other than C.  Please see your language binding's
 documentation for information on how to load the `Rsvg` namespace.
 
-[c-docs]: https://developer.gnome.org/rsvg/stable/
+[c-docs]: https://developer-old.gnome.org/rsvg/unstable/
 [rust-docs]: https://gnome.pages.gitlab.gnome.org/librsvg/doc/librsvg/index.html
 
 Contributing to librsvg's development
diff --git a/SECURITY.md b/SECURITY.md
index 61157818..6cb8cf19 100644
--- a/SECURITY.md
+++ b/SECURITY.md
@@ -176,7 +176,7 @@ documents.
 external files by itself: XML XInclude, `xlink:href` attributes, etc.
 Please see the section "Security and locations of referenced files" in
 the [developer's
-documentation](https://developer.gnome.org/rsvg/stable/RsvgHandle.html)
+documentation](https://developer-old.gnome.org/rsvg/unstable/RsvgHandle.html)
 to see what criteria is used to accept or reject a file based on its
 location.  If your application has more stringent requirements, it may
 need to sandbox its use of librsvg.
diff --git a/doc/rsvg-docs.xml b/doc/rsvg-docs.xml
index cb6e94b4..ccf8bf62 100644
--- a/doc/rsvg-docs.xml
+++ b/doc/rsvg-docs.xml
@@ -11,7 +11,7 @@
       For librsvg version &version;
 
       The latest version of this documentation can be found on-line at the
-      <ulink url="https://developer.gnome.org/rsvg/stable/"; role="online-location">GNOME Library</ulink>.
+      <ulink url="https://developer-old.gnome.org/rsvg/unstable/"; role="online-location">GNOME 
Library</ulink>.
     </releaseinfo>
 
     <copyright>
diff --git a/src/accept_language.rs b/src/accept_language.rs
index 239ffb75..c4190651 100644
--- a/src/accept_language.rs
+++ b/src/accept_language.rs
@@ -19,7 +19,7 @@ pub enum Language {
     /// Use the Unix environment variables `LANGUAGE`, `LC_ALL`, `LC_MESSAGES` and `LANG` to obtain the
     /// user's language.  This uses [`g_get_language_names()`][ggln] underneath.
     ///
-    /// [ggln]: https://developer.gnome.org/glib/stable/glib-I18N.html#g-get-language-names
+    /// [ggln]: https://docs.gtk.org/glib/func.get_language_names.html
     FromEnvironment,
     AcceptLanguage(AcceptLanguage),
 }
diff --git a/tests/README.md b/tests/README.md
index a3e69562..df0156e2 100644
--- a/tests/README.md
+++ b/tests/README.md
@@ -327,7 +327,7 @@ is set up with a hardcoded mode for antialiasing, hinting, and hint
 metrics.
 
 
-[gtest]: https://developer.gnome.org/glib/stable/glib-Testing.html
+[gtest]: https://docs.gtk.org/glib/testing.html
 [bug]: ../CONTRIBUTING.md#reporting-bugs
 [pull-requests]: ../CONTRIBUTING.md#pull-requests
 [maintainer]: README.md#maintainers