standardize on ga python 313 (Azure#37930)

Author: scbedd

eng/pipelines/templates/stages/platform-matrix-excluding-pypy.json

@@ -42,7 +42,7 @@
         "Ubuntu2004_3130": {
           "OSVmImage": "env:LINUXVMIMAGE",
           "Pool": "env:LINUXPOOL",
-          "PythonVersion": "3.13.0-rc.3",
+          "PythonVersion": "3.13",
           "CoverageArg": "--disablecov",
           "TestSamples": "false"
         }

eng/pipelines/templates/stages/platform-matrix.json

@@ -42,7 +42,7 @@
         "Ubuntu2004_313": {
           "OSVmImage": "env:LINUXVMIMAGE",
           "Pool": "env:LINUXPOOL",
-          "PythonVersion": "3.13.0-rc.3",
+          "PythonVersion": "3.13",
           "CoverageArg": "--disablecov",
           "TestSamples": "false"
         }

sdk/cosmos/cosmos-emulator-matrix.json

@@ -46,7 +46,7 @@
             "Skip.Analyze": "true"
         },
         "Emulator Tests Python 3.13": {
-            "PythonVersion": "3.13.0-rc.3",
+            "PythonVersion": "3.13",
             "CoverageArg": "--disablecov",
             "TestSamples": "false",
             "ToxTestEnv": "'whl,sdist'",