chore: remove assign_issues from blunderbuss configuration (#759)

Author: panavenue

.github/blunderbuss.yml

@@ -12,8 +12,5 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-assign_issues:
-  - hessjcg
-
 assign_prs:
   - hessjcg

.github/workflows/tests.yaml

@@ -28,7 +28,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@4b73464bb391d4059bd26b0524d20df3927bd417 # v6.3.0
         with:
-          go-version: "1.25"
+          go-version: "1.26"
       - name: Checkout code
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
@@ -69,7 +69,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@4b73464bb391d4059bd26b0524d20df3927bd417 # v6.3.0
         with:
-          go-version: "1.25"
+          go-version: "1.26"
       - name: Set up QEMU
         uses: docker/setup-qemu-action@ce360397dd3f832beb865e1373c09c0e9f86d70a # v4.0.0
       - name: Set up Docker Buildx