ci: Mount runner-root-volume in Telink workflow (#73067)

Mounts the root volume to the containers in the Telink workflow (both
latest and Zephyr 3.3 jobs) to enable disk space maximization, fixing
"Unable to maximize disk space" errors.

.github/workflows/examples-telink.yaml

diff --git a/.github/workflows/examples-telink.yaml b/.github/workflows/examples-telink.yaml
index 551d50c..8c4e161 100644
--- a/.github/workflows/examples-telink.yaml
+++ b/.github/workflows/examples-telink.yaml
@@ -76,6 +76,7 @@
         container:
             image: ghcr.io/project-chip/chip-build-telink:200
             volumes:
+                - "/:/runner-root-volume"
                 - "/tmp/bloat_reports:/tmp/bloat_reports"
 
         steps:
@@ -460,6 +461,7 @@
         container:
             image: ghcr.io/project-chip/chip-build-telink-zephyr_3_3:200
             volumes:
+                - "/:/runner-root-volume"
                 - "/tmp/bloat_reports:/tmp/bloat_reports"
 
         steps: