murdock-worker/Dockerfile: update git-cache-rs to the latest version

[crasbe]

The git-cache-rs version specified in the Dockerfile is very old and does not seem to work anymore?
On my local ThinkPad that acts as a CI worker currently, only git-cache files were present but no git-cache-rs folders.

riotbuild@b84655cf2cf7:/cache/.gitcache$ ls -l
total 520
drwxr-xr-x 7 riotbuild root 4096 Oct 14  2025 10077753813265320433.git
-rw-r--r-- 1 riotbuild root    0 Apr 20 16:38 10077753813265320433.lock
drwxr-xr-x 7 riotbuild root 4096 Oct 14  2025 10223567230215662083.git
-rw-r--r-- 1 riotbuild root    0 Apr 20 14:55 10223567230215662083.lock
drwxr-xr-x 7 riotbuild root 4096 Oct 23 23:55 1022674748962676621.git
-rw-r--r-- 1 riotbuild root    0 Oct 23 23:55 1022674748962676621.lock
drwxr-xr-x 7 riotbuild root 4096 Oct 14  2025 10275685405471410120.git
-rw-r--r-- 1 riotbuild root    0 Apr 20 17:22 10275685405471410120.lock
drwxr-xr-x 7 riotbuild root 4096 Oct 14  2025 10395226093010920096.git
-rw-r--r-- 1 riotbuild root    0 Apr 20 17:23 10395226093010920096.lock
drwxr-xr-x 7 riotbuild root 4096 Oct 14  2025 10412693831896225484.git
-rw-r--r-- 1 riotbuild root    0 Apr 20 17:06 10412693831896225484.lock
drwxr-xr-x 7 riotbuild root 4096 Oct 14  2025 10556324815249665068.git
-rw-r--r-- 1 riotbuild root    0 Apr 20 16:33 10556324815249665068.lock
drwxr-xr-x 7 riotbuild root 4096 Oct 14  2025 10620790921438452123.git
...

This PR just bumps the version of git-cache-rs to the latest version.

Verified to work on my local machine:

riotbuild@d852a7ef1af4:/cache/.gitcache$ ls -l
total 528
drwxr-xr-x  7 riotbuild root 4096 Oct 14  2025 10077753813265320433.git
-rw-r--r--  1 riotbuild root    0 Apr 20 16:38 10077753813265320433.lock
...
drwxr-xr-x  7 riotbuild root 4096 Oct 14  2025 9609903824853689138.git
-rw-r--r--  1 riotbuild root    0 Apr 20 16:34 9609903824853689138.lock
drwxr-xr-x  3 riotbuild root 4096 Apr 20 17:55 git.riot-os.org
drwxr-xr-x 14 riotbuild root 4096 Apr 20 18:04 github.com

[crasbe]

Discovered in RIOT-OS/RIOT#22197 .

[crasbe]

In the latest fixups, I utilized the feature from RIOT-OS/RIOT#21815 to avoid the static test failing because of the Docker container ID mismatch.

[crasbe]

In the latest fixups, I utilized the feature from RIOT-OS/RIOT#21815 to avoid the static test failing because of the Docker container ID mismatch.

This is now outsourced into another PR.