Update solaris-ci.yml

Author: halx99

.github/workflows/solaris-ci.yml

@@ -17,6 +17,7 @@ jobs:
     - name: Build
       uses: vmactions/solaris-vm@main
       with:
+        release: "11.4-gcc"
         usesh: true
         sync: rsync
         copyback: false
@@ -27,7 +28,7 @@ jobs:
           pkgutil -y -i cmake
           # required by mbedtls-3.3.0
           python3 --version
-          pip-3.5 install jsonschema jinja2
+          pip-3.7 install jsonschema jinja2
           # gcc
           echo y | pkg install gcc
           # check tools