Merge branch 'main' into release/v2

* main:
  Prepare for release 2.26.0.
  Bump @actions/core from 1.6.0 to 1.9.1 (#262)
  Add action types (#257)
  Update documentation (#255)

node_modules/@actions/core/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@actions/core",
-  "version": "1.6.0",
+  "version": "1.9.1",
   "description": "Actions core lib",
   "keywords": [
     "github",
@@ -36,9 +36,11 @@
     "url": "https://github.com/actions/toolkit/issues"
   },
   "dependencies": {
-    "@actions/http-client": "^1.0.11"
+    "@actions/http-client": "^2.0.1",
+    "uuid": "^8.3.2"
   },
   "devDependencies": {
-    "@types/node": "^12.0.2"
+    "@types/node": "^12.0.2",
+    "@types/uuid": "^8.3.4"
   }
 }