CI(nuget_pkg): rather use beta version

Because we use NativeSegwit for the nuget package, let's
use a beta version (0.9 instead of 0.7, like the beta snap).

.github/workflows/CI.yml

@@ -512,6 +512,10 @@ jobs:
       run: git config --global --add safe.directory '*'
     - name: configure
       run: ./configure.sh --native-segwit
+    - name: Bump version to beta (because segwit)
+      run: |
+        git submodule foreach git fetch --all && git submodule sync --recursive && git submodule update --init --recursive
+        dotnet fsi ./scripts/beta_bump.fsx
     - name: pack&push
       run: make push
 
@@ -582,7 +586,7 @@ jobs:
     - name: Bump snap version
       run: |
         git submodule foreach git fetch --all && git submodule sync --recursive && git submodule update --init --recursive
-        dotnet fsi ./scripts/snap_bump.fsx
+        dotnet fsi ./scripts/beta_bump.fsx
 
     - name: Generate snap package
       run: |