[ci] reset opam cache

.github/workflows/main.yml

@@ -255,7 +255,7 @@ jobs:
         uses: actions/[email protected]
         with:
           path: ~/.opam/
-          key: ${{ runner.os }}-${{ hashFiles('./opam', './libs/') }}
+          key: ${{ runner.os }}-${{ hashFiles('./opam', './libs/') }}-1
 
       - name: Install Neko from S3
         run: |
@@ -482,7 +482,7 @@ jobs:
         uses: actions/[email protected]
         with:
           path: ~/.opam/
-          key: ${{ runner.os }}-${{ hashFiles('./opam', './libs/') }}
+          key: ${{ runner.os }}-${{ hashFiles('./opam', './libs/') }}-1
 
       - name: Install Neko from S3
         run: |

extra/github-actions/cache-opam.yml

@@ -3,4 +3,4 @@
   uses: actions/[email protected]
   with:
     path: ~/.opam/
-    key: ${{ runner.os }}-${{ hashFiles('./opam', './libs/') }}
+    key: ${{ runner.os }}-${{ hashFiles('./opam', './libs/') }}-1