Improvements to wasm deployment (#78)

* Cancel previous deploy workflow when start new one

* Add link to wasm deployment in README

Author: ianthomas23

.github/workflows/deploy-wasm.yml

@@ -7,6 +7,10 @@ on:
       - main
   workflow_dispatch:
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   build:
     runs-on: ubuntu-latest

README.md

@@ -35,3 +35,6 @@ WebAssembly [Emscripten-forge](https://emscripten-forge.org/) package, create lo
 and test the WebAssembly build.
 
 See the `README.md` in the `wasm` directory for further details.
+
+The latest `cockle` and JupyterLite `terminal` deployments using `git2cpp` are available at
+[https://quantstack.net/git2cpp](https://quantstack.net/git2cpp)