docs: drop <owner> placeholder and fix repo host

Replace the <owner> stub and stale gitea.pc-heini.de host with the
real git.pc-heini.de/pc-heini URL in the README install snippet and
o3de.flatpakrepo. Retitle the caveats section now that the items are
confirmed rather than pending verification.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

README.md

@@ -19,9 +19,9 @@ repository on the `pages` branch of this repo. You add that as a Flatpak remote
 # Flathub provides the runtime O3DE needs
 flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo
 
-# Add this repo (replace <owner> with the Gitea account that owns the repo)
+# Add this repo
 flatpak remote-add --if-not-exists o3de \
-  https://gitea.pc-heini.de/<owner>/o3de-flatpak/raw/branch/pages/o3de.flatpakrepo
+  https://git.pc-heini.de/pc-heini/o3de-flatpak/raw/branch/pages/o3de.flatpakrepo
 
 flatpak install o3de org.o3de.O3DE
 flatpak run org.o3de.O3DE
@@ -128,11 +128,11 @@ The first iteration publishes an unsigned repo for simplicity. To sign:
 
 ---
 
-## Caveats & things to verify
+## Caveats
 
-These were confirmed by inspecting the v26.05 package (`opt/O3DE/26.05/…`):
+These were confirmed by inspecting and running the v26.05 package (`opt/O3DE/26.05/…`):
 
-- **Layout is confirmed for now**: the package installs everything under
+- **Layout**: the package installs everything under
   `/opt/O3DE/<ver>/`, with the launcher at `bin/Linux/profile/Default/o3de` and
   ~270 `.so` files beside it (hence the wrapper's `LD_LIBRARY_PATH`). If a future
   release moves things, adjust `o3de-wrapper.sh` and the manifest.