Readme bump.

README.md

@@ -51,7 +51,7 @@ Add the following to your `pipeline.yml`:
 steps:
   - label: "terraform"
     plugins:
-      - echoboomer/terraform#v1.3.0:
+      - echoboomer/terraform#v1.2.26:
           init_args:
             - "-input=false"
             - "-backend-config=bucket=my_gcp_bucket"
@@ -65,7 +65,7 @@ While no commands are required, out of the box behavior may be undesirable witho
 steps:
   - label: "terraform"
     plugins:
-      - echoboomer/terraform#v1.3.0:
+      - echoboomer/terraform#v1.2.26:
           init_args:
             - "-input=false"
             - "-backend-config=bucket=my_gcp_bucket"
@@ -83,7 +83,7 @@ To pass in extra environment variables to the Docker container:
 steps:
   - label: "terraform"
     plugins:
-      - echoboomer/terraform#v1.3.0:
+      - echoboomer/terraform#v1.2.26:
           env:
             - "FOO=foo"
             - "BAR=baz"
@@ -104,7 +104,7 @@ If you want an out of the box solution that simply executes a `plan` on non-mast
 steps:
   - label: "terraform"
     plugins:
-      - echoboomer/terraform#v1.3.0:
+      - echoboomer/terraform#v1.2.26:
           apply_master: true
           init_args:
             - "-input=false"
@@ -123,7 +123,7 @@ steps:
   - label: "terraform plan"
     branches: "!master"
     plugins:
-      - echoboomer/terraform#v1.3.0:
+      - echoboomer/terraform#v1.2.26:
           init_args:
             - "-input=false"
             - "-backend-config=bucket=my_gcp_bucket"
@@ -137,7 +137,7 @@ steps:
     plugins:
       - artifacts#v1.2.0:
           download: "tfplan"
-      - echoboomer/terraform#v1.3.0:
+      - echoboomer/terraform#v1.2.26:
           apply_only: true
           init_args:
             - "-input=false"