Update README.md

README.md

@@ -36,11 +36,11 @@ To use last development states of ScalFMM, please clone the master
   branch. Note that ScalFMM contains two git submodules `morse_cmake` and `inastemp`.
   To get sources please use these commands:
 ``` bash
-git clone --recursive git@gitlab.inria.fr:solverstack/ScalFMM.git -b requested_branch
+git clone --recursive https://gitlab.inria.fr/solverstack/ScalFMM.git -b requested_branch
 ```
 or
 ```bash
-git clone git@gitlab.inria.fr:solverstack/ScalFMM.git
+git clone https://gitlab.inria.fr/solverstack/ScalFMM.git
 cd ScalFMM
 git submodule init
 git submodule update