fix README.rst

Author: daytime-saxophone

README.rst

@@ -320,7 +320,7 @@ which tries several authentication methods, in this order:
 4. `Azure CLI credentials <https://pkg.go.dev/github.com/Azure/azure-sdk-for-go/sdk/azidentity#AzureCLICredential>`_
 
 
-If you want to force a specific method you can override this with the enviornment variable `SOPS_AZURE_AUTH_METHOD`
+If you want to force a specific method you can override this with the enviornment variable ``SOPS_AZURE_AUTH_METHOD``
 - ``default`` (same as not setting this variable)
 - ``msi``
 - ``azure-cli``