Update actions/setup-go action to v6.4.0 (#202)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/ci.yaml

@@ -62,7 +62,7 @@ jobs:
         with:
           python-version: ${{ matrix.python }}
 
-      - uses: actions/setup-go@4b73464bb391d4059bd26b0524d20df3927bd417 # v6.3.0
+      - uses: actions/setup-go@4a3601121dd01d1626a1e23e37211e3254c1c06c # v6.4.0
         with:
           go-version-file: protoc-gen-connect-python/go.mod
           cache-dependency-path: "**/go.mod"

.github/workflows/release.yaml

@@ -19,7 +19,7 @@ jobs:
 
       - uses: astral-sh/setup-uv@cec208311dfd045dd5311c1add060b2062131d57 # v8.0.0
 
-      - uses: actions/setup-go@4b73464bb391d4059bd26b0524d20df3927bd417 # v6.3.0
+      - uses: actions/setup-go@4a3601121dd01d1626a1e23e37211e3254c1c06c # v6.4.0
         with:
           go-version-file: protoc-gen-connect-python/go.mod
           cache-dependency-path: "**/go.mod"