For testing in my build

dist/restore/index.js

@@ -6717,6 +6717,7 @@ var Inputs;
     Inputs["Key"] = "key";
     Inputs["Path"] = "path";
     Inputs["RestoreKeys"] = "restore-keys";
+    Inputs["Update"] = "update";
 })(Inputs = exports.Inputs || (exports.Inputs = {}));
 var Outputs;
 (function (Outputs) {

dist/save/index.js

@@ -6605,9 +6605,14 @@ function run() {
                 return;
             }
             if (utils.isExactKeyMatch(primaryKey, state)) {
+                if (core.getInput(constants_1.Inputs.Update) === "true") {
+                    core.info(`Cache hit occurred on the primary key ${primaryKey}, but updates were enabled, so updating cache.`);
+                }
+                else {
                     core.info(`Cache hit occurred on the primary key ${primaryKey}, not saving cache.`);
                     return;
                 }
+            }
             const cachePaths = utils.getInputAsArray(constants_1.Inputs.Path, {
                 required: true
             });
@@ -6802,6 +6807,7 @@ var Inputs;
     Inputs["Key"] = "key";
     Inputs["Path"] = "path";
     Inputs["RestoreKeys"] = "restore-keys";
+    Inputs["Update"] = "update";
 })(Inputs = exports.Inputs || (exports.Inputs = {}));
 var Outputs;
 (function (Outputs) {