Makefiles - refer to python in more generic way

src/bonsai/Makefile

@@ -17,8 +17,8 @@
 # along with Bonsai.  If not, see <http://www.gnu.org/licenses/>.
 
 SHELL := sh
-PYTHON:=python3.11
-PIP:=pip3.11
+PYTHON:=python3
+PIP:=pip3
 PATCH:=patch
 SED:=sed -i
 VENV_ACTIVATE:=bin/activate

src/common.mk

@@ -1,7 +1,7 @@
 SHELL := sh
 IS_STABLE:=FALSE
-PYTHON:=python3.11
-PIP:=pip3.11
+PYTHON:=python3
+PIP:=pip3
 VERSION:=$(shell cat ../../VERSION)
 VERSION_DATE:=$(shell date '+%y%m%d')
 SED:=sed -i

src/ifcopenshell-python/Makefile

@@ -5,8 +5,8 @@ VERSION_DATE:=$(shell date '+%y%m%d')
 PYVERSION:=py311
 PLATFORM:=linux64
 
-PYTHON:=python3.11
-PIP:=pip3.11
+PYTHON:=python3
+PIP:=pip3
 SED:=sed -i
 VENV_ACTIVATE:=bin/activate