Had a small error in the FormId attribute format which does translate to form-id.

Author: jooni91

src/ReCaptcha/TagHelpers/RecaptchaInvisibleTagHelper.cs

@@ -35,9 +35,9 @@ namespace Griesoft.AspNetCore.ReCaptcha.TagHelpers
     /// </code>
     /// </example>
     [HtmlTargetElement("recaptcha-invisible", Attributes = "callback", TagStructure = TagStructure.WithoutEndTag)]
-    [HtmlTargetElement("recaptcha-invisible", Attributes = "formid", TagStructure = TagStructure.WithoutEndTag)]
+    [HtmlTargetElement("recaptcha-invisible", Attributes = "form-id", TagStructure = TagStructure.WithoutEndTag)]
     [HtmlTargetElement("button", Attributes = "re-invisible,callback")]
-    [HtmlTargetElement("button", Attributes = "re-invisible,formid")]
+    [HtmlTargetElement("button", Attributes = "re-invisible,form-id")]
     public class RecaptchaInvisibleTagHelper : TagHelper
     {
         private readonly ITagHelperComponentManager _tagHelperComponentManager;

src/ReCaptcha/TagHelpers/RecaptchaV3TagHelper.cs

@@ -33,8 +33,8 @@ namespace Griesoft.AspNetCore.ReCaptcha.TagHelpers
     /// <button class="g-recaptcha" data-sitekey="your_site_key" data-callback='submitmyForm' data-action='submit'>Submit</button>
     /// </code>
     /// </example>
-    [HtmlTargetElement(Attributes = "callback,action")]
-    [HtmlTargetElement(Attributes = "formid,action")]
+    [HtmlTargetElement("recaptcha-v3", Attributes = "callback,action")]
+    [HtmlTargetElement("recaptcha-v3", Attributes = "form-id,action")]
     public class RecaptchaV3TagHelper : TagHelper
     {
         private readonly ITagHelperComponentManager _tagHelperComponentManager;