feat(loki): add 3.7.3 to the published tag matrix (#63)

CVE-2026-39822 (High) on loki-3.7 is fixed in 3.7.3-r1. Not yet present
in the wolfi package feed as of this commit (tops out at 3.7.2-r3) -
the pinned build for this tag will start resolving once wolfi publishes
it, same as the other pinned patch versions in this matrix.

Author: ixxeL2097

.github/workflows/loki.yaml

@@ -29,7 +29,7 @@ jobs:
   publish:
     strategy:
       matrix:
-        version: [latest, "3.7", "3.7.2", "3.7.1", "3.6.10", "3.6.8"]
+        version: [latest, "3.7", "3.7.3", "3.7.2", "3.7.1", "3.6.10", "3.6.8"]
         variant: [prod, shell]
     name: ${{ matrix.version }}${{ matrix.variant == 'shell' && '-shell' || '' }}
     uses: './.github/workflows/release.yaml'