update flask in run (GoogleCloudPlatform#3402)

Author: leahecole

run/hello-broken/requirements.txt

@@ -1,4 +1,4 @@
-Flask==1.1.1
+Flask==1.1.2
 pytest==5.3.0; python_version > "3.0"
 pytest==4.6.6; python_version < "3.0"
 gunicorn==20.0.4

run/image-processing/requirements.txt

@@ -1,7 +1,7 @@
-Flask==1.1.1
+Flask==1.1.2
 pytest==5.3.0; python_version > "3.0"
 pytest==4.6.6; python_version < "3.0"
 gunicorn==20.0.4
 google-cloud-vision==1.0.0
 google-cloud-storage==1.26.0
-Wand==0.5.9
+Wand==0.5.9

run/logging-manual/requirements.txt

@@ -1,4 +1,4 @@
-Flask==1.1.1
+Flask==1.1.2
 pytest==5.3.2; python_version > "3.0"
 pytest==5.3.2; python_version < "3.0"
 gunicorn==20.0.4

run/pubsub/requirements.txt

@@ -1,4 +1,4 @@
-Flask==1.1.1
+Flask==1.1.2
 pytest==5.3.2; python_version > "3.0"
 pytest==5.3.2; python_version < "3.0"
 gunicorn==20.0.4

run/system-package/requirements.txt

@@ -1,3 +1,3 @@
-Flask==1.1.1
+Flask==1.1.2
 pytest==5.4.1
 gunicorn==20.0.4