Update README.md

fixed order

README.md

@@ -185,24 +185,23 @@ CD into ardupilot directory
 cd ~/ardupilot
 ```
 bla bla bla
-### 3) Get submodules
+### 3) Get branch/release you want
+```
+git checkout v2.2.1
+```
+(Note: V2.2 was functional on an armed drone on 3/13/2024. The OSD update lagged but the avoidance detection worked when antoher RID drone simulated came close, with geodesic altitude check.)
+      Note if you want to use a specific branch, use instead the command git checkout my_branch
+### 4) Get submodules
 ```
 git submodule update --init --recursive
 ```
-### 4) Get tools
+### 5) Get tools
 ```
 Tools/environment_install/install-prereqs-ubuntu.sh -y;
 . ~/.profile;
 sudo apt-get install python3-wxgtk4.0 -y --no-install-recommends;
 sudo apt install python-is-python3
 ```
-### 5) Get branch/release you want
-```
-git checkout v2.2.1
-```
-(Note: V2.2 was functional on an armed drone on 3/13/2024. The OSD update lagged but the avoidance detection worked when antoher RID drone simulated came close, with geodesic altitude check.)
-      Note if you want to use a specific branch, use instead the command git checkout my_branch
-   Note: Have to run checkout AFTER submodule command or you will get the official ardupilot submodules, which is not what you want...
 ### 6) Configure build with waf
 ```
 ./waf configure --board sitl