Update the description of new inputs

These new inputs will not work on pull requests from forks.

analyze/action.yml

@@ -46,10 +46,10 @@ inputs:
     required: false
     default: ${{ github.workspace }}
   ref:
-    description: "The ref where results will be uploaded. If not provided, the Action will use the GITHUB_REF environment variable. If provided, the sha input must be provided as well."
+    description: "The ref where results will be uploaded. If not provided, the Action will use the GITHUB_REF environment variable. If provided, the sha input must be provided as well. This input is not available in pull requests from forks."
     required: false
   sha:
-    description: "The sha of the HEAD of the ref where results will be uploaded. If not provided, the Action will use the GITHUB_SHA environment variable. If provided, the ref input must be provided as well."
+    description: "The sha of the HEAD of the ref where results will be uploaded. If not provided, the Action will use the GITHUB_SHA environment variable. If provided, the ref input must be provided as well. This input is not available in pull requests from forks."
     required: false
   category:
     description: String used by Code Scanning for matching the analyses

upload-sarif/action.yml

@@ -14,10 +14,10 @@ inputs:
     required: false
     default: ${{ github.workspace }}
   ref:
-    description: "The ref where results will be uploaded. If not provided, the Action will use the GITHUB_REF environment variable. If provided, the sha input must be provided as well."
+    description: "The ref where results will be uploaded. If not provided, the Action will use the GITHUB_REF environment variable. If provided, the sha input must be provided as well. This input is not available in pull requests from forks."
     required: false
   sha:
-    description: "The sha of the HEAD of the ref where results will be uploaded. If not provided, the Action will use the GITHUB_SHA environment variable. If provided, the ref input must be provided as well."
+    description: "The sha of the HEAD of the ref where results will be uploaded. If not provided, the Action will use the GITHUB_SHA environment variable. If provided, the ref input must be provided as well. This input is not available in pull requests from forks."
     required: false
   token:
     default: ${{ github.token }}