Update win installer readme, pip, grab repaired miniupnpc whl

Author: hoffmang9

.github/workflows/windows-installer.yml

@@ -26,6 +26,7 @@ jobs:
 
     - name: Collect and Create wheels for chia-blockchain
       run: |
+        python -m pip install --upgrade pip
         pip install pep517 wheel
         pip wheel --use-pep517 --only-binary cbor2 --extra-index-url https://download.chia.net/simple/ -f ${{ github.workspace }} --wheel-dir=${{ github.workspace }}\electron-wix\blockchain ${{ github.workspace }}\.
 

electron-wix/blockchain/readme.txt

@@ -31,6 +31,14 @@ To use the Chia Wallet UI you will need to run:
 
 And then click on the "Chia Wallet" icon on the Desktop or in the Start Menu.
 
+To stop a service, from the venv try for example:
+    chia stop farmer
+Or
+    chia stop all
+
+After install, you can enter the venv in the "Chia Blockchain" directory with:
+    .\venv\Scrips\Activate.ps1
+
 For more usage information try:
 The chia-blockchain README.md - https://github.com/Chia-Network/chia-blockchain/blob/master/README.md
 The chia-blockchain repo wiki - https://github.com/Chia-Network/chia-blockchain/wiki