refactor: replace git checkout with git switch for branch/tag navigation

Author: KristjanESPERANTO

README.md

@@ -123,7 +123,7 @@ v1.1.1
 v1.1.2
 ```
 
-Then you can checkout that version with, for example `git checkout v1.0.0`, or use `git checkout master` to checkout the most recent version.
+Then you can checkout that version with, for example `git switch --detach v1.0.0`, or use `git switch master` to checkout the most recent version.
 
 ## Known limitations
 

installer.sh

@@ -70,11 +70,11 @@ if [ -d "$MM_HOME/modules/$MODULE_NAME" ] ; then
     echo ""
     if [ "$BRANCH" == "master" ]; then
         if check_yes "Do you want to switch to the develop branch?"; then
-            git checkout develop
+            git switch develop
         fi
     else
         if check_yes "Do you want to switch to the master branch?"; then
-            git checkout master
+            git switch master
         fi
     fi
     echo ""