Add TensorFlow 2.12 to test matrix (#1139)

Author: oliverholworthy

.github/workflows/tensorflow.yml

@@ -42,7 +42,7 @@ jobs:
       matrix:
         python-version: [3.8]
         os: [ubuntu-latest]
-        tensorflow-version: ["~=2.9.0", "~=2.10.0", "~=2.11.0"]
+        tensorflow-version: ["~=2.9.0", "~=2.10.0", "~=2.11.0", "~=2.12.0"]
 
     steps:
       - uses: actions/checkout@v3
@@ -101,7 +101,7 @@ jobs:
       matrix:
         python-version: [3.8]
         os: [ubuntu-latest]
-        tensorflow-version: ["~=2.9.0", "~=2.10.0", "~=2.11.0"]
+        tensorflow-version: ["~=2.9.0", "~=2.10.0", "~=2.11.0", "~=2.12.0"]
 
     steps:
       - uses: actions/checkout@v3