docs: document the removal of IA32 Linux support (#34787)

* docs: document the removal of IA32 Linux support

Chromium had dropped support for IA32 Linux, so the Chromium
102.0.4999.0 upgrade PR,
https://github.com/electron/electron/pull/33731, had introduced the commit,
https://github.com/electron/electron/pull/33731/commits/389ef0731efca802db2089486ad6d9a91cc02ba8,
to drop support for IA32 Linux but the change landed without an addition
to the documentation for the breaking changes, so this PR adds that.

Closes: https://github.com/electron/electron/issues/34783
Refs: https://bugs.chromium.org/p/chromium/issues/detail?id=1194538
Signed-off-by: Darshan Sen <[email protected]>

* Update docs/breaking-changes.md

Co-authored-by: Keeley Hammond <[email protected]>

Co-authored-by: Jeremy Rose <[email protected]>
Co-authored-by: Keeley Hammond <[email protected]>

docs/breaking-changes.md

@@ -98,7 +98,10 @@ is the origin that is checking for device permission.
 
 ## Planned Breaking API Changes (19.0)
 
-None
+### Removed: IA32 Linux binaries
+
+This is a result of Chromium 102.0.4999.0 dropping support for IA32 Linux.
+This concludes the [removal of support for IA32 Linux](#removed-ia32-linux-support).
 
 ## Planned Breaking API Changes (18.0)
 
@@ -1265,6 +1268,10 @@ not present, then the native module will fail to load on Windows, with an error
 message like `Cannot find module`. See the [native module
 guide](/docs/tutorial/using-native-node-modules.md) for more.
 
+### Removed: IA32 Linux support
+
+Electron 18 will no longer run on 32-bit Linux systems. See [discontinuing support for 32-bit Linux](https://www.electronjs.org/blog/linux-32bit-support) for more information.
+
 ## Breaking API Changes (3.0)
 
 The following list includes the breaking API changes in Electron 3.0.