Fix typos (#21947)

Two typos

The `recieve` typo is also present in a translation.

https://github.com/go-gitea/gitea/blob/5f38acd9a08958024e8bbf47bcc482c79d844e44/options/locale/locale_sv-SE.ini#L1760
Someone with a Crowdin account should fix that.

... and in a license file but I don't think we can change that because
that's the official text.

https://github.com/go-gitea/gitea/blob/5f38acd9a08958024e8bbf47bcc482c79d844e44/options/license/xinetd#L21

modules/base/tool.go

@@ -43,7 +43,7 @@ func EncodeSha1(str string) string {
 	return hex.EncodeToString(h.Sum(nil))
 }
 
-// EncodeSha256 string to sha1 hex value.
+// EncodeSha256 string to sha256 hex value.
 func EncodeSha256(str string) string {
 	h := sha256.New()
 	_, _ = h.Write([]byte(str))