package/go: security bump to go1.21.8

Fixes the following CVEs:

CVE-2024-24783: crypto/x509: Verify panics on certificates with an unknown public key algorithm
CVE-2023-45290: net/http: memory exhaustion in Request.ParseMultipartForm
CVE-2023-45289: net/http, net/http/cookiejar: incorrect forwarding of sensitive headers and cookies on HTTP redirect
CVE-2024-24785: html/template: errors returned from MarshalJSON methods may break template escaping
CVE-2024-24784: net/mail: comments in display names are incorrectly handled

https://go.dev/doc/devel/release#go1.21.8

Signed-off-by: Christian Stewart <christian@aperture.us>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit a94f816e4595e651e78eebfa49fa695cfe44cd77)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/go/go.hash

@@ -1,3 +1,3 @@
 # From https://go.dev/dl
-sha256  00197ab20f33813832bff62fd93cca1c42a08cc689a32a6672ca49591959bff6  go1.21.7.src.tar.gz
+sha256  dc806cf75a87e1414b5b4c3dcb9dd3e9cc98f4cfccec42b7af617d5a658a3c43  go1.21.8.src.tar.gz
 sha256  2d36597f7117c38b006835ae7f537487207d8ec407aa9d9980794b2030cbc067  LICENSE

package/go/go.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-GO_VERSION = 1.21.7
+GO_VERSION = 1.21.8
 GO_SITE = https://storage.googleapis.com/golang
 GO_SOURCE = go$(GO_VERSION).src.tar.gz