Doc: ChangeLog: update for 3.0.0-rc3 release

ChangeLog.md

@@ -1,3 +1,25 @@
+# Pacemaker-3.0.0-rc3 (23 Dec 2024)
+* 33 commits with 9 files changed, 77 insertions(+), 12 deletions(-)
+
+## Features added since Pacemaker-3.0.0-rc2
+
+* Inkscape is no longer a build dependency for Pacemaker documentation
+* The `ocf:pacemaker:controld` agent will now always manage `dlm_controld`
+  (previously, it would try to manage the long-obsolete `gfs_controld` if the
+  resource name started with `gfs`)
+
+## Fixes since Pacemaker-3.0.0-rc2
+
+* **agents:** `ocf:pacemaker:ping` now uses `grep -E` instead of the obsolete
+  `egrep`
+* **tools:** when injecting a fail count with `crm_simulate`, use an `INFINITY`
+  score when the cluster would
+* **tools:** validate `stonith_admin --timeout` value
+
+## Public API changes since Pacemaker-3.0.0-rc2
+
+* **Python:** add `PACEMAKER_CONFIG_DIR` to `BuildOptions`
+
 # Pacemaker-3.0.0-rc2 (11 Dec 2024)
 * 57 commits with 44 files changed, 1487 insertions(+), 633 deletions(-)