Pin to buildkit 0.9.1 in an attempt to mitigate problems

docker/buildx#834 (comment)

Author: shepmaster

.github/workflows/ci.yml

@@ -33,7 +33,7 @@ jobs:
     - name: Set up Docker Buildx
       uses: docker/setup-buildx-action@v1
       with:
-        driver-opts: image=moby/buildkit:master
+        driver-opts: image=moby/buildkit:v0.9.1
     - name: Login to GitHub Container Registry
       uses: docker/login-action@v1
       with:
@@ -138,7 +138,7 @@ jobs:
     - name: Set up Docker Buildx
       uses: docker/setup-buildx-action@v1
       with:
-        driver-opts: image=moby/buildkit:master
+        driver-opts: image=moby/buildkit:v0.9.1
     - name: Login to GitHub Container Registry
       uses: docker/login-action@v1
       with:

.github/workflows/cron.yml

@@ -29,7 +29,7 @@ jobs:
     - name: Set up Docker Buildx
       uses: docker/setup-buildx-action@v1
       with:
-        driver-opts: image=moby/buildkit:master
+        driver-opts: image=moby/buildkit:v0.9.1
     - name: Login to GitHub Container Registry
       uses: docker/login-action@v1
       with:
@@ -148,7 +148,7 @@ jobs:
     - name: Set up Docker Buildx
       uses: docker/setup-buildx-action@v1
       with:
-        driver-opts: image=moby/buildkit:master
+        driver-opts: image=moby/buildkit:v0.9.1
     - name: Login to GitHub Container Registry
       uses: docker/login-action@v1
       with:

ci/workflows.yml

@@ -22,7 +22,7 @@ components:
       uses: docker/setup-buildx-action@v1
       with:
         driver-opts: >-
-          image=moby/buildkit:master
+          image=moby/buildkit:v0.9.1
 
   - login_ghcr: &login_ghcr
       name: "Login to GitHub Container Registry"