README: use tagged release

Author: bilelmoussaoui

README.md

@@ -29,7 +29,7 @@ jobs:
       options: --privileged
     steps:
     - uses: actions/checkout@v2
-    - uses: bilelmoussaoui/flatpak-github-actions/flatpak-builder@master
+    - uses: bilelmoussaoui/flatpak-github-actions/flatpak-builder@v3
       with:
         bundle: "palette.flatpak"
         manifest-path: "org.gnome.zbrown.Palette.yml"
@@ -66,12 +66,12 @@ jobs:
       options: --privileged
     steps:
     - uses: actions/checkout@v2
-    - uses: bilelmoussaoui/flatpak-github-actions/flatpak-builder@master
+    - uses: bilelmoussaoui/flatpak-github-actions/flatpak-builder@v3
       name: "Build"
       with:
         bundle: "palette.flatpak"
         manifest-path: "org.gnome.zbrown.Palette.yml"
-    - uses: bilelmoussaoui/flatpak-github-actions/flat-manager@master
+    - uses: bilelmoussaoui/flatpak-github-actions/flat-manager@v3
       name: "Deploy"
       with:
         repository: elementary
@@ -101,4 +101,4 @@ You can specify the specific runtime you need to use through the image tags:
 | GNOME           | 3.38    | `gnome-3.38`        | `image: bilelmoussaoui/flatpak-github-actions:gnome-3.38`        |
 | GNOME           | 40    | `gnome-40`        | `image: bilelmoussaoui/flatpak-github-actions:gnome-40`        |
 | KDE             | 5.15    | `kde-5.15`          | `image: bilelmoussaoui/flatpak-github-actions:kde-5.15`          |
-| elementary BaseApp             | juno    | `juno`          | `image: bilelmoussaoui/flatpak-github-actions:elementary-juno`          |
+| elementary BaseApp             | juno    | `juno`          | `image: bilelmoussaoui/flatpak-github-actions:elementary-juno`          |