Add generated license chips

Author: akullpp

.github/workflows/update-readme.yml

@@ -61,9 +61,9 @@ jobs:
         uses: actions/cache@v5
         with:
           path: .cache/github-stats.tsv
-          key: readme-stats-v2-${{ github.ref_name }}-${{ github.run_id }}
+          key: readme-stats-v3-${{ github.ref_name }}-${{ github.run_id }}
           restore-keys: |
-            readme-stats-v2-${{ github.ref_name }}-
+            readme-stats-v3-${{ github.ref_name }}-
       - name: Validate source and generator
         run: |
           java scripts/GenerateReadme.java self-test

CONTRIBUTING.md

@@ -23,9 +23,9 @@ A project should:
 - disclose restrictive, noncommercial or source-available terms in the entry;
 - have clear pricing and a free tier when commercial.
 
-Add `![c]` after the project name for commercial products. Keep descriptions
-short, factual and distinctive from similar entries. Use `Miscellaneous` only
-when no focused category fits.
+Known GitHub SPDX licenses appear automatically; do not add license or
+commercial badges manually. Keep descriptions short, factual and distinctive
+from similar entries. Use `Miscellaneous` only when no focused category fits.
 
 Search existing entries and issues before submitting. Self-promotion is
 reviewed carefully but is welcome when the project meets the same criteria.