Bug 1627424 - Fix run-on-projects for SM(smoosh) jobs. r=ahal

Differential Revision: https://phabricator.services.mozilla.com/D75953

taskcluster/ci/spidermonkey/linux.yml

@@ -85,7 +85,7 @@ sm-smoosh-linux64/debug:
             - linux64-gcc
             - linux64-rust
             - linux64-cbindgen
-    run-on-projects: ['central']
+    run-on-projects: ['mozilla-central']
 
 sm-smoosh-linux64/opt:
     description: "Spidermonkey SmooshMonkey"
@@ -103,7 +103,7 @@ sm-smoosh-linux64/opt:
             - linux64-gcc
             - linux64-rust
             - linux64-cbindgen
-    run-on-projects: ['central']
+    run-on-projects: ['mozilla-central']
 
 sm-warp-linux64/debug:
     description: "Spidermonkey WarpBuilder"