Upgrade to Go 1.21 🚀

[sue445-version-upgrader]

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[sue445]

Umm...

$ docker build .
[+] Building 38.7s (12/14)                                                                                                                                   docker:desktop-linux

(snip)

 > [build-env 4/4] RUN make:
0.227 GO111MODULE=on go build -ldflags="-s -w -X \"main.Version=v0.12.2\" -X \"main.Revision=69fdcd8\" -extldflags \"-static\"" -o bin/gitpanda
0.272 SIGSEGV: segmentation violation
0.272 PC=0x8094cbf m=1 sigcode=1
0.272 
0.272 goroutine 0 [idle]:
0.273 runtime.runqput(0x0, 0x8c06400, 0x1)
0.273   runtime/proc.go:6206 +0xaf fp=0x40800cf8 sp=0x40800cd8 pc=0x8094cbf
0.274 runtime.newproc.func1()
0.274   runtime/proc.go:4484 +0x56 fp=0x40800d0c sp=0x40800cf8 pc=0x80905c6
0.274 runtime.systemstack()
0.274   runtime/asm_386.s:374 +0x41 fp=0x40800d10 sp=0x40800d0c pc=0x80b9a71
0.274 
0.274 goroutine 1 [running, locked to thread]:
0.274   goroutine running on other thread; stack unavailable
0.274 
0.274 goroutine 2 [runnable]:
0.274 runtime.forcegchelper()
0.274   runtime/proc.go:313 fp=0x8c2fff0 sp=0x8c2ffec pc=0x8087bd0
0.274 runtime.goexit()
0.274   runtime/asm_386.s:1363 +0x1 fp=0x8c2fff4 sp=0x8c2fff0 pc=0x80bae01
0.274 created by runtime.init.5 in goroutine 1
0.274   runtime/proc.go:310 +0x23
0.275 
0.275 eax    0x0
0.275 ebx    0x8c06400
0.275 ecx    0x8c06300
0.275 edx    0x0
0.275 edi    0x8c06400
0.275 esi    0x0
0.275 ebp    0x8c06300
0.275 esp    0x40800cd8
0.275 eip    0x8094cbf
0.275 eflags 0x202
0.275 cs     0x23
0.275 fs     0x0
0.275 gs     0x33
0.278 make: *** [Makefile:12: bin/gitpanda] Error 2
------
Dockerfile:6
--------------------
   4 |     WORKDIR /work
   5 |     
   6 | >>> RUN make
   7 |     
   8 |     FROM debian:bookworm-slim
--------------------
ERROR: failed to solve: process "/bin/sh -c make" did not complete successfully: exit code: 2