README.md: update version to v1

Change-Id: Ie615cb2071f9ed3f43e38d1d00230e372634fbb0
Reviewed-on: https://go-review.googlesource.com/c/govulncheck-action/+/509355
Reviewed-by: Julie Qiu <julieqiu@google.com>
TryBot-Bypass: Julie Qiu <julieqiu@google.com>
Reviewed-by: Brandon Kessler <bkessler@google.com>
diff --git a/README.md b/README.md
index 9b1f644..8c2b199 100644
--- a/README.md
+++ b/README.md
@@ -16,7 +16,7 @@
 
 ```yaml
 - id: govulncheck
-  uses: golang/govulncheck-action@v0.2.0
+  uses: golang/govulncheck-action@v1
 ```
 
 By default the govulncheck Github Action will run with the
@@ -34,7 +34,7 @@
 
 ```yaml
 - id: govulncheck
-  uses: golang/govulncheck-action@v0.2.0
+  uses: golang/govulncheck-action@v1
   with:
      go-version-input: <your-Go-version>
      go-package: <your-package-pattern>
@@ -52,9 +52,9 @@
     name: Run govulncheck
     steps:
       - id: govulncheck
-        uses: golang/govulncheck-action@v0.2.0
+        uses: golang/govulncheck-action@v1
         with:
-           go-version-input: 1.20.4
+           go-version-input: 1.20.6
            go-package: ./...
 ```
 When a vulnerability is found, an error will be displayed for that