safe: unpin go1.17

pkgs/top-level/all-packages.nix

···
 
   sacd = callPackage ../tools/cd-dvd/sacd { };
 
-  safe = callPackage ../tools/security/safe {
-    # pinned due to build failure or vendoring problems. When unpinning double check with: nix-build -A $name.go-modules --rebuild
-    buildGoModule = buildGo117Module;
-  };
+  safe = callPackage ../tools/security/safe { };
 
   safety-cli = with python3.pkgs; toPythonApplication safety;