frank-small quadlet: ContainerEntrypoint -> Entry (v1 generator key)

The podman 5.x v1 quadlet generator on dankclaw rejects
ContainerEntrypoint with 'unsupported key in group Container', so the
unit was never generated and the deploy died at restart with 'Unit
frank-small.service not found'. Entry= is the v1 spelling.

tests/frank_small_unit.bats

@@ -62,7 +62,7 @@ QUADLET_LARGE="$REPO_ROOT/dankclaw/frank-large/quadlet/frank-large.container"
 }
 
 @test "frank-small runs the repo's own entrypoint with the repo's env" {
-    grep -q '^ContainerEntrypoint=/scripts/serve-frank-small.sh$' "$QUADLET"
+    grep -q '^Entry=/scripts/serve-frank-small.sh$' "$QUADLET"
     grep -q '^Environment=FRANK_SMALL_ENV_FILE=/scripts/frank-small.env$' "$QUADLET"
     grep -q 'Volume=/home/dank/serverAppConfigs/scripts:/scripts:ro' "$QUADLET"
 }