update download link

Author: davegarvey

.github/workflows/tyk-demo-tests.yml

@@ -14,7 +14,7 @@ jobs:
           is ${{ github.repository }}."
       - name: Install websocat (binary method)
         run: |
-          wget https://github.com/vi/websocat/releases/latest/download/websocat_amd64
+          wget https://github.com/vi/websocat/releases/download/v1.14.0/websocat.x86_64-unknown-linux-musl
           chmod +x websocat_amd64
           sudo mv websocat_amd64 /usr/local/bin/websocat
       - name: Check Out Repository Code