Fix links to crates (#6839)

Because of #6821

### Checklist
* [x] I have read and agree to [Contributor
Guide](https://github.com/rerun-io/rerun/blob/main/CONTRIBUTING.md) and
the [Code of
Conduct](https://github.com/rerun-io/rerun/blob/main/CODE_OF_CONDUCT.md)

crates/utils/re_analytics/README.md

@@ -19,7 +19,7 @@ Find out its location by running `rerun analytics config`.
 Run `rerun analytics disable` to opt out of all usage data collection.
 
 ### What data is collected?
-The exact set of analytics events and parameters can be found here: <https://github.com/rerun-io/rerun/blob/main/crates/re_analytics/src/event.rs>
+The exact set of analytics events and parameters can be found here: <https://github.com/rerun-io/rerun/blob/main/crates/utils/re_analytics/src/event.rs>
 
 - We collect high level events about the usage of the Rerun Viewer. For example:
     - The event 'Viewer Opened' helps us estimate how often Rerun is used.

crates/utils/re_analytics/src/event.rs

@@ -7,7 +7,7 @@
 //!
 //! All collected analytics data is anonymized, stripping all personal identifiable information
 //! as well as information about user data.
-//! Read more about our analytics policy at <https://github.com/rerun-io/rerun/tree/main/crates/re_analytics>.
+//! Read more about our analytics policy at <https://github.com/rerun-io/rerun/tree/main/crates/utils/re_analytics>.
 
 /// Records a crash caused by a panic.
 ///

crates/viewer/re_viewer/src/viewer_analytics/mod.rs

@@ -1,6 +1,6 @@
 //! Most analytics events collected by the Rerun Viewer are defined in this file.
 //!
-//! All events are defined in the `re_analytics` crate: <https://github.com/rerun-io/rerun/blob/main/crates/re_analytics/src/event.rs>
+//! All events are defined in the `re_analytics` crate: <https://github.com/rerun-io/rerun/blob/main/crates/utils/re_analytics/src/event.rs>
 //!
 //! Analytics can be completely disabled with `rerun analytics disable`,
 //! or by compiling rerun without the `analytics` feature flag.

docs/content/howto/extend/extend-ui.md

@@ -12,7 +12,7 @@ In the above screenshot you see the example [`extend_viewer_ui`](https://github.
 
 ### How to build it
 
-The Rerun Viewer is defined by the crate [`re_viewer`](https://github.com/rerun-io/rerun/tree/main/crates/re_viewer). It uses the popular Rust GUI library [`egui`](https://github.com/emilk/egui) (written by our CTO) and its framework [`eframe`](https://github.com/emilk/egui/tree/master/crates/eframe). To extend the UI you need to create your own `eframe` application and embed `re_viewer` inside of it. You can then use `egui` to add custom panels and windows.
+The Rerun Viewer is defined by the crate [`re_viewer`](https://github.com/rerun-io/rerun/tree/main/crates/viewer/re_viewer). It uses the popular Rust GUI library [`egui`](https://github.com/emilk/egui) (written by our CTO) and its framework [`eframe`](https://github.com/emilk/egui/tree/master/crates/eframe). To extend the UI you need to create your own `eframe` application and embed `re_viewer` inside of it. You can then use `egui` to add custom panels and windows.
 
 The best way to get started is by reading [the source code of the `extend_viewer_ui` example](https://github.com/rerun-io/rerun/tree/main/examples/rust/extend_viewer_ui).
 

lychee.toml

@@ -115,6 +115,7 @@ exclude = [
   'https://9p.io/sys/doc/lexnames.html',                               # Works locally but on CI we get: `Failed: Network error: error:0A000152:SSL routines:final_renegotiate:unsafe legacy renegotiation disabled:ssl/statem/extensions.c:946:`
   'https://pixabay.com/photos/brother-sister-girl-family-boy-977170/', # Gives 403 forbidden on CI.
   'https://stackoverflow.com/',                                        # Stackoverflow links are no longer accessible from CI.
+  'https://math.stackexchange.com/',                                   # Gives 403 forbidden on CI.
   'https://vimeo.com/',                                                # Gives 403 forbidden on CI.
   'https://www.reddit.com/',                                           # Gives 403 forbidden on CI.
   'https://www.tensorflow.org/',                                       # tensorflow.org apparently blocks CI.