tutorials: links to monorepo

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1670>

subprojects/gst-docs/markdown/tutorials/android/link-against-gstreamer.md

@@ -11,8 +11,7 @@ linkage problems.
 
 ## Hello GStreamer \[Java code\]
 
-The tutorial code is in the [gst-docs](https://gitlab.freedesktop.org/gstreamer/gst-docs/)
-in the `examples/tutorials/android/android-tutorial-1` subdirectory.
+The tutorial code is in the [subdirectory](https://gitlab.freedesktop.org/gstreamer/gstreamer/-/tree/main/subprojects/gst-docs/examples/tutorials/android/android-tutorial-1).
 This directory contains the usual Android NDK structure: a `src` folder for the Java code,
 a `jni` folder for the C code and a `res` folder for UI resources.
 

subprojects/gst-docs/markdown/tutorials/ios/link-against-gstreamer.md

@@ -11,8 +11,7 @@ GStreamer library from Xcode using objective-C.
 ## Hello GStreamer!
 
 The tutorials code are in the
-[gst-docs](https://gitlab.freedesktop.org/gstreamer/gst-docs/) in the
-`tutorials/xcode iOS` folder.
+[folder](https://gitlab.freedesktop.org/gstreamer/gstreamer/-/tree/main/subprojects/gst-docs/examples/tutorials/xcode%20iOS/).
 
 It was created using the GStreamer Single View
 Application template. The view contains only a `UILabel` that will be

subprojects/gst-docs/markdown/tutorials/playback/hardware-accelerated-video-decoding.md

@@ -41,7 +41,7 @@ currently not limited to Intel GPUs as other manufacturers are free to
 use this API, for example, [Imagination
 Technologies](http://en.wikipedia.org/wiki/Imagination_Technologies) or
 [S3 Graphics](http://en.wikipedia.org/wiki/S3_Graphics). Accessible to
-GStreamer through the [gstreamer-vaapi](https://gitlab.freedesktop.org/gstreamer/gstreamer-vaapi/) package.
+GStreamer through the [gstreamer-vaapi](https://gitlab.freedesktop.org/gstreamer/gstreamer/-/tree/main/subprojects/gstreamer-vaapi/) package.
 
 - [VDPAU](http://en.wikipedia.org/wiki/VDPAU) (*Video Decode and
 Presentation API for UNIX*): Initially designed by