build: only run job on main repo and not on forks

Author: Planeshifter

.github/workflows/markdown_pkg_urls.yml

@@ -42,6 +42,9 @@ jobs:
     # Define a display name:
     name: 'Update Markdown stdlib package URLs'
 
+    # Ensure the job does not run on forks:
+    if: github.repository == 'stdlib-js/stdlib'
+
     # Define the type of virtual host machine:
     runs-on: ubuntu-latest
 

.github/workflows/markdown_related_packages.yml

@@ -47,6 +47,9 @@ jobs:
     # Define a display name:
     name: 'Update related packages section of READMEs'
 
+    # Ensure the job does not run on forks:
+    if: github.repository == 'stdlib-js/stdlib'
+
     # Define the type of virtual host machine:
     runs-on: ubuntu-latest
 

.github/workflows/npm_downloads.yml

@@ -43,6 +43,9 @@ jobs:
     # Define a display name:
     name: 'Retrieve npm Download Counts'
 
+    # Ensure the job does not run on forks:
+    if: github.repository == 'stdlib-js/stdlib'
+
     # Define the type of virtual host machine on which to run the job:
     runs-on: ubuntu-latest