Bump ocaml version

Author: Fabien-Chouteau

.github/workflows/linux.yml

@@ -141,7 +141,7 @@ jobs:
     strategy:
       matrix:
         ocaml-compiler:
-          - 4.11.2
+          - 4.12.1
 
     runs-on: ubuntu-20.04
     steps:
@@ -180,7 +180,7 @@ jobs:
     strategy:
       matrix:
         ocaml-compiler:
-          - "4.11.2"
+          - 4.12.1
     runs-on: ubuntu-20.04
     steps:
       - name: Checkout code

.github/workflows/macos.yml

@@ -138,7 +138,7 @@ jobs:
     strategy:
       matrix:
         ocaml-compiler:
-          - 4.11.2
+          - 4.12.1
     runs-on: macos-12
     steps:
       - name: Checkout code
@@ -176,7 +176,7 @@ jobs:
     strategy:
       matrix:
         ocaml-compiler:
-          - "4.11.2"
+          - 4.12.1
 
     runs-on: macos-12
     steps:

.github/workflows/macos_arm.yml

@@ -101,7 +101,7 @@ jobs:
     strategy:
       matrix:
         ocaml-compiler:
-          - 4.11.2
+          - 4.12.1
     runs-on: macos-14
     steps:
       - name: Checkout code
@@ -139,7 +139,7 @@ jobs:
     strategy:
       matrix:
         ocaml-compiler:
-          - "4.11.2"
+          - 4.12.1
 
     runs-on: macos-14
     steps:

.github/workflows/windows.yml

@@ -188,7 +188,7 @@ jobs:
     strategy:
       matrix:
         ocaml-compiler:
-          - 4.11.2
+          - 4.12.1
     runs-on: windows-2019
     steps:
       - name: Checkout code
@@ -226,7 +226,7 @@ jobs:
     strategy:
       matrix:
         ocaml-compiler:
-          - "4.11.2"
+          - 4.12.1
     runs-on: windows-2019
     steps:
       - name: Checkout code