update git URLs (git -> https; gitea)

Change-Id: I22bc1dd5c8a33fbccc8cc6d0d8daf7f558f17f44
diff --git a/configure.ac b/configure.ac
index bf85c07..2467c68 100644
--- a/configure.ac
+++ b/configure.ac
@@ -441,7 +441,7 @@
 	AM_PATH_PYTHON
 	AC_CHECK_PROG(OSMOTESTEXT_CHECK,osmo_verify_transcript_vty.py,yes)
 	 if test "x$OSMOTESTEXT_CHECK" != "xyes" ; then
-		AC_MSG_ERROR([Please install git://osmocom.org/python/osmo-python-tests to run the VTY/CTRL tests.])
+		AC_MSG_ERROR([Please install https://gitea.osmocom.org/cellular-infrastructure/osmo-python-tests to run the VTY/CTRL tests.])
 	fi
 fi
 AC_MSG_CHECKING([whether to enable VTY/CTRL tests])