added mpw-6a tag in makefile

Makefile

diff --git a/Makefile b/Makefile
index e95876a..e246405 100644
--- a/Makefile
+++ b/Makefile
@@ -28,7 +28,7 @@
 # Install lite version of caravel, (1): caravel-lite, (0): caravel
 CARAVEL_LITE?=1
 
-MPW_TAG ?= mpw-5c
+MPW_TAG ?= mpw-6a
 
 ifeq ($(CARAVEL_LITE),1)
 	CARAVEL_NAME := caravel-lite

docs/source/index.rst

diff --git a/docs/source/index.rst b/docs/source/index.rst
index 0d580bf..9bcf741 100644
--- a/docs/source/index.rst
+++ b/docs/source/index.rst
@@ -171,9 +171,12 @@
 
     # set PDK_ROOT to the path you wish to use for the pdk
     export PDK_ROOT=<pdk-installation-path>
+    
+    # set the OPENLANE_ROOT to the openlane installation path
+    export OPENLANE_ROOT=<openlane-installation-path>
 
     # use volare to download the pdk
-    make pdk-with-volare -f $(OPENLANE_ROOT)/dependencies/tool_metadata.yml
+    make pdk-with-volare 
 
 Running Full Chip Simulation
 ============================

docs/source/quickstart.rst

diff --git a/docs/source/quickstart.rst b/docs/source/quickstart.rst
index 78c75cf..e538e7e 100644
--- a/docs/source/quickstart.rst
+++ b/docs/source/quickstart.rst
@@ -53,7 +53,7 @@
     .. code:: bash
 
         # Make sure that "caravel_example" matches the empty github repo name in step 1
-        git clone -b mpw-5c https://github.com/efabless/caravel_user_project caravel_example
+        git clone -b mpw-6a https://github.com/efabless/caravel_user_project caravel_example
         cd caravel_example
         git remote rename origin upstream