Update get-frama-c.html

html/get-frama-c.html

@@ -62,7 +62,7 @@ sudo apt upgrade
 sudo apt install make m4 gcc opam
 
 <span class="shell-win-comment"># 2. opam setup</span>
-opam init --disable-sandboxing -c 4.07.1 --shell-setup
+opam init --disable-sandboxing --shell-setup
 eval $(opam env)
 opam install -y depext