Add CHANGLOG.md entry for supporting pre-installed packages (TriBITSP…

…ub#63)

tribits/CHANGELOG.md

@@ -2,6 +2,23 @@
 ChangeLog for TriBITS
 ----------------------------------------
 
+## 2023-02-21:
+
+* Add support for pre-installed internal packages treated as external
+  packages.  Now, any set of internally defined TriBITS packages for a TriBITS
+  project can be pre-built and pre-installed and the remaining packages in the
+  TriBITS project can be configured to point to those by setting `-D
+  TPL_ENABLE_<Package>=ON`.  This allows great flexibility in how a TriBITS
+  project's packages can be and built, installed, and deployed.  This
+  technically implements "Use Case 3: Configure/build pointing to a subset of
+  already installed TriBITS packages in same repo" in [TriBITS
+  #63](https://github.com/TriBITSPub/TriBITS/issues/63).  See the section
+  "Building against pre-installed packages" in the updated build reference
+  documentation for details.
+
+* **Fixed:** Setting `-D<Project>_ENABLE_<TplName>=ON` for an external
+   package/TPL `<TplName>` will not correctly enable and process the TPL.
+
 ## 2022-12-07:
 
 * **Changed:** Setting `-D<Project>_ENABLE_<TplName>=ON` now triggers the